Induction 〔 competent: Determined Expressed Able to respond in Able to follow same The apical meristem appropriate removal from its morphogenesis. evelope plant. egetative growth Figure 11-1
Figure 11-1
(leaves LDP(plant) B SDP(eaves)c SDP (Tip) SDP g.113
Fig. 11-3
l6L-8D,一个光诱导周期:15L-9D),16L-8D 16L-8D15L-9D 小囤也逃四想 Fig.11-5 a B
Fig.11-5
Light Photoperiodism Low Sucrose Gibberellins number temperature Far r GA receptor PHYB-PHYA CRY1 CRY2 Vernalization CLOCK GENES Autonomous Energy Gibberellin pathway Florigen (phloem) Inhibits FLOWERING LOCUS C flowering d CONSTANS AGAMOUS-LIKE 20 Meristem identity genes LEAFY FIGURE 24.32 Four developmental path ways for flowering in Arabidopsis: the Figure 11-7 photoperiodism, autonomous/vernaliza- tion, sucrose, and gibberellin pathways A transmissible floral stimulus(flori gen")from leaves is only involved in the HAG Floral photoperiodic pathway( After Blazquez 2000.) AP3, P/ homeotic genes Sepals Petals Stamens Carpels Floral organs
Figure 11-7
(A) Wild type Interpretation of the phe notypes of floral homeotic mutants based on the ABC model. (A) Wild type:(B)Loss of C function results in expansion of the A function throughout the floral meristem. (C) Loss of A func tion results in the spread of C function Genes throughout the meristem. (D) Loss of B function results in the expression of Structure Sepal Petal Stamen only A and C functions, (B)Loss of c function Whorl Genes structure Petal Sepal (C) Loss of A function Genes Structure Carpel Stamen stamen Fig 11-8 (D) Loss of B function Structure Carpel Carpe
Fig.11-8 Fig.11-8