| Preface |
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1 | (26) |
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1 The evolution of flowers |
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3 | (13) |
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1.1 The origin of flowering plants |
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3 | (4) |
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1.2 Seed plant reproductive structures |
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7 | (1) |
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8 | (4) |
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1.4 Floral diversification |
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12 | (1) |
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1.5 Morphological diversity of the flower |
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13 | (1) |
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1.6 An introduction to angiosperm phylogeny |
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13 | (3) |
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2 Historical interpretations of flower induction and flower development |
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16 | (11) |
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2.1 The foliar theory of the flower |
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16 | (5) |
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2.2 The foliar theory in an evolutionary context |
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21 | (1) |
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2.3 The transition to flowering |
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22 | (1) |
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2.4 Developmental explanations of floral induction |
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22 | (1) |
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2.5 Environmental explanations of floral induction |
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23 | (2) |
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25 | (2) |
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SECTION II THE MOLECULAR MECHANISMS OF FLOWERING: INDUCTION AND DEVELOPMENT |
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27 | (124) |
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Part A Induction of Flowering |
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29 | (2) |
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3 Flower induction in Arabidopsis thaliana |
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31 | (12) |
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3.1 Arabidopsis thaliana as a model system for the study of flowering |
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31 | (4) |
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3.2 Mechanisms of gene silencing |
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35 | (3) |
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3.3 Flowering-time mutants |
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38 | (5) |
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4 The autonomous pathways for floral inhibition and induction |
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43 | (9) |
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4.1 The floral inhibition pathway |
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43 | (4) |
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4.2 The autonomous induction pathway |
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47 | (3) |
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4.3 Other endogenous factors that influence flowering time |
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50 | (2) |
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5 The photoperiodic pathway of floral induction |
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52 | (11) |
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52 | (6) |
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58 | (2) |
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5.3 Integrating light and clock signals |
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60 | (3) |
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6 The vernalization pathway of floral induction and the role of gibberellin |
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63 | (7) |
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6.1 The vernalization promotion pathway |
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63 | (4) |
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6.2 The gibberellin promotion pathway |
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67 | (2) |
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6.3 Does gibberellin act in the vernalization promotion pathway as well as independently? |
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69 | (1) |
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7 Integrating the Arabidopsis thaliana flower induction pathways |
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70 | (7) |
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7.1 Integrating the flowering-time pathways |
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70 | (1) |
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7.2 Function of flowering-time integrators |
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71 | (6) |
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8 Flower induction beyond Arabidopsis thaliana |
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77 | (12) |
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8.1 The Arabidopsis flower induction model in other species |
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77 | (1) |
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8.2 Flower induction in rice: a model short day plant |
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77 | (4) |
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8.3 Flower induction in wheat and barley: a novel vernalization pathway |
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81 | (1) |
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8.4 Flower induction in perennials |
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82 | (3) |
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8.5 Flower induction in legumes |
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85 | (1) |
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8.6 Flower induction in other species |
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85 | (4) |
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Part B Development of Flowers |
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87 | (2) |
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9 Changes at the shoot apical meristem in response to floral induction |
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89 | (13) |
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9.1 Physiological changes at the shoot apical meristem |
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89 | (1) |
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9.2 Shoot apical meristem anatomy |
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90 | (1) |
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9.3 Gene expression patterns in the shoot apical meristem |
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91 | (1) |
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9.4 Floral meristem identity genes act downstream of the flowering-time integrators |
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92 | (1) |
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9.5 Floral meristem identity genes |
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92 | (10) |
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10 Development of the floral organs |
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102 | (13) |
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10.1 The original ABC model of flower development |
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102 | (7) |
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10.2 The role of D function genes |
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109 | (1) |
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10.3 The role of E function genes |
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110 | (1) |
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10.4 The role of cadastral genes |
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111 | (2) |
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10.5 The quartet model of organ identity |
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113 | (2) |
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11 The ABC model and the diversity of plant reproductive structures |
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115 | (12) |
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11.1 Evolutionary history of MADS box transcription factors |
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115 | (2) |
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11.2 ABC genes in gymnosperms |
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117 | (2) |
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11.3 ABC genes in early diverging angiosperms |
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119 | (1) |
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11.4 ABC genes in monocots |
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120 | (4) |
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11.5 ABC genes in the basal eudicots |
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124 | (1) |
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11.6 Variations on the ABC model |
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124 | (1) |
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11.7 Is A function unique to the Brassicaceae? |
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125 | (2) |
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12 Function and development of gametophytes |
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127 | (9) |
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12.1 Alternation of generations in multicellular organisms |
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127 | (2) |
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12.2 Diversity of gametophyte form |
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129 | (1) |
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12.3 The angiosperm female gametophyte |
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129 | (3) |
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12.4 The angiosperm male gametophyte |
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132 | (3) |
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12.5 Events following pollination |
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135 | (1) |
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13 Outcrossing and self-fertilization |
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136 | (15) |
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13.1 Reducing self-pollination in a hermaphroditic flower |
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136 | (2) |
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138 | (2) |
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140 | (2) |
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13.4 Self-incompatibility (SI) |
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142 | (1) |
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13.5 Sporophytic self-incompatibility (SSI) |
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142 | (4) |
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13.6 Gametophytic self-incompatibility (GSI) |
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146 | (2) |
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13.7 Heteromorphic self-incompatibility |
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148 | (1) |
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13.8 Ensuring self-pollination |
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149 | (2) |
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SECTION III POLLINATION SUCCESS: MOLECULAR AND ECOLOGICAL INTERACTIONS |
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151 | (94) |
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Part A How and Why Does Floral Form Vary? |
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153 | (2) |
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14 Why are flowers different? Pollination syndromes: the theory |
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155 | (12) |
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155 | (1) |
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14.2 Abiotic pollen vectors |
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155 | (2) |
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14.3 Biotic pollen vectors |
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157 | (1) |
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14.4 Principles underlying the pollination syndrome concept |
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157 | (1) |
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14.5 The pollination syndromes |
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158 | (9) |
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15 Diverse floral shape and structure |
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167 | (9) |
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15.1 Controlling corolla size |
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167 | (2) |
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15.2 Controlling corolla symmetry |
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169 | (3) |
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15.3 Controlling petal shape |
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172 | (1) |
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15.4 Generating a nectar spur |
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173 | (1) |
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15.5 Generating a composite inflorescence |
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174 | (2) |
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176 | (12) |
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176 | (2) |
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178 | (1) |
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16.3 Carotenoid synthesis |
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178 | (3) |
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181 | (4) |
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185 | (3) |
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17 Enhancing flower colour |
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188 | (12) |
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188 | (1) |
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189 | (1) |
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17.3 Regulation of pigment distribution |
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189 | (4) |
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17.4 The effects of metal ions |
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193 | (1) |
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17.5 The importance of pH |
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194 | (2) |
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17.6 The role of petal cell shape |
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196 | (2) |
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17.7 Structural colour and structural enhancement of colour |
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198 | (2) |
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18 Lability of floral form |
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200 | (13) |
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18.1 Lability of floral size |
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200 | (1) |
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18.2 Lability of floral symmetry |
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201 | (3) |
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18.3 Lability of nectar spur length |
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204 | (1) |
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18.4 Lability of flower colour |
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205 | (2) |
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18.5 Lability of epidermal morphology |
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207 | (2) |
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18.6 Lability of floral scent |
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209 | (4) |
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Part B The Influence of Pollinators on Floral Form |
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211 | (2) |
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19 Are flowers under selective pressure to increase pollinator attention? |
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213 | (10) |
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19.1 Competition for pollinator attention |
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213 | (1) |
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19.2 Facilitation of pollination |
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214 | (1) |
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19.3 Techniques for investigating the role of pollinator attention in limiting fitness |
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214 | (3) |
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19.4 Evidence based on fruit and seed set following hand pollination |
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217 | (1) |
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19.5 Evidence from mixed species plots |
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218 | (2) |
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19.6 Analysis of character traits potentially displaced by pollination competition |
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220 | (3) |
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20 Do pollinators discriminate between different floral forms? |
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223 | (13) |
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20.1 What pollinators see |
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223 | (2) |
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20.2 What pollinators sense in other ways |
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225 | (2) |
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20.3 Discrimination between petals of different colours |
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227 | (5) |
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20.4 Discrimination between corollas of different sizes |
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232 | (2) |
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20.5 Discrimination between zygomorphic and actinomorphic flowers |
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234 | (1) |
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20.6 Discrimination between flowers with different petal cell shapes |
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234 | (1) |
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20.7 Discrimination between flowers on the basis of scent |
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235 | (1) |
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21 Pollination syndromes: the evidence |
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236 | (9) |
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236 | (1) |
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21.2 Putting the assumptions together |
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237 | (3) |
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21.3 Evidence for pollination syndromes |
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240 | (1) |
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21.4 Evidence against pollination syndromes |
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241 | (2) |
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21.5 The most effective pollinator? |
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243 | (2) |
| Epilogue |
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245 | (2) |
| References |
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247 | (36) |
| Index |
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283 | |