Reproduction of Plants
- Created by: lavithedemon
- Created on: 11-04-16 14:01
View mindmap
- Reproduction in plants
- flowering involves a change in gene expression in the shoot apex
- vegetative phase - the young plant that comes out from a seed
- change to the reproductive phase when flowers will appear
- light is a main factor
- temperature as well
- change to the reproductive phase when flowers will appear
- vegetative phase - the young plant that comes out from a seed
- the switch to flowering is a response to the lenght of light and dark periods in many plants
- Pr absorbs red light of wavelenght 660 nm - Pfr
- when Pfr absorbs far - red light, (730 nm) it is converted to Pr
- in long - day plants have Pfr remain at the end of the short nights to bind to the receptor, which then promotes transcriptions of genes needed for flowering
- in short -day plants the receptor inhibits the transcription of the genes needed for flowering when Pfr binds to it However, very little Pfr remains o the inhibition fails and the plant flowers
- Most flowering plants use mutualistic relationship with pollinators in sexual reproduction
- sexual reproduction - transfer of pollen from stamen to stigma
- Success in plant reproduction depends on pollination, fertilisation and seed dispersal
- fertilisation - male gametes into the style to the ovary
- flowering involves a change in gene expression in the shoot apex
Comments
No comments have yet been made