17 Questions
What characterizes stage 15 of Arabidopsis flower development?
The stigma extends above the long anthers
Which feature is observed during stage 16 of Arabidopsis flower development?
The silique is twice as long as a stage-13 pistil
What occurs during stage 17 of Arabidopsis flower development?
Senescent floral organs abscise from the silique
In Arabidopsis flower development, what happens during stage 18?
The silique begins to dry out as the endocarp disintegrates
What is suggested to contribute to the silique shattering process in Arabidopsis flower development?
Lignification of endocarp cell layers
During which stage of Arabidopsis flower development does the green silique reach its final length?
Stage 17
Which gene has been linked to the promotion of lamina outgrowth and expansion in Arabidopsis, maize, and rice?
AIL/PLT
Which gene acts as a positive regulator of leaf blade growth in Arabidopsis?
JAGGED
Which factor influences leaf size and shape by repressing plant organ growth?
Poly(A) polymerases (PAPS)
What is responsible for the formation of marginal structures resulting from differential growth in adjacent regions?
Local restriction of growth
Which gene promotes growth in both layers of the epidermis?
ANGUSTIFOLIA3 (AN3)
What is the purpose of the ABC model for floral development?
To explain the genetic control of flower development
In stage 20 of Arabidopsis flower development, what happens to the valves of the silique?
They separate from the silique
What is the significance of the separation layer in stage 19 of flower development?
It lacks cell cohesion leading to valve separation
Which process marks the readiness for seed dispersal in a dehiscent silique?
Silique shattering
What does the ABC model for floral development help explain?
Genetic control of flower development
How do the valves of a dehiscent silique change from stage 19 to stage 20?
They separate from the dry silique
Test your knowledge on the development stages of plants with a focus on stage 15 where the stigma extends above the anthers and cell division continues, and stage 16 where the petals and sepals begin to wither and the silique continues to expand.
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