What do cytokinins regulate?
Cytokinin regulates the activity of reproductive meristems, flower organ size, ovule formation, and thus seed yield in Arabidopsis thaliana.Nov 27, 2015
What do cytokinins control?
It has been recognized that cytokinins are plant hormones that influence not only numerous aspects of plant growth, development and physiology, including cell division, chloroplast differentiation and delay of senescence but the interaction with other organisms, including pathogens.Dec 19, 2019
What are cytokinins responsible for?
Cytokinins (CKs) influence various traits of plant growth, development and physiology such as seed germination, apical dominance, flower and fruit development, leaf senescence and plant-pathogen-interactions etc.Dec 19, 2019
What do cytokinins inhibit?
Cytokinins Inhibit Lateral Root Development. Cytokinins are known to be involved in multiple developmental processes, including rhizogenesis (Haberer and Kieber, 2002).
Do cytokinins inhibit cell division?
Cytokinin promotes nuclear localization of a transcription factor to activate cell division. Organ morphogenesis in plants is largely determined by the rate and patterns of cell division (1) occurring primarily in meristematic tissues such as the shoot and root meristems, and vascular cambium (2).Feb 25, 2021
Does cytokinin inhibit auxin?
An increase in cytokinin level counteracts this inhibitory effect and leads to an inhibition of auxin signaling. At higher concentrations of both hormones, these antagonistic interactions between cytokinin and auxin are absent.
Does cytokinin inhibit root growth?
Besides auxin, cytokinin (CK) is also involved in root organogenesis. Increase in CK levels by exogenous application or overexpression of the bacterial ISOPENTENYLTRANSFERASE (IPT) gene (17, 18) inhibits the root growth and reduces the meristem size.Mar 17, 2009
How does cytokinin regulate growth?
Cytokinins are essential plant hormones. By stimulating cell division, they regulate shoot meristem size, leaf primordia number, and leaf and shoot growth. They can stimulate both the differentiation and the outgrowth of axillary buds. The cytokinins can mediate axillary bud release from apical dominance.
What do cytokinins do for growth?
Cytokinins promote cell division and increase cell expansion during the proliferation and expansion stages of leaf cell development, respectively. During leaf senescence, cytokinins reduce sugar accumulation, increase chlorophyll synthesis, and prolong the leaf photosynthetic period.Jun 1, 2021
Does cytokinins affect plant growth?
It has been recognized that cytokinins are plant hormones that influence not only numerous aspects of plant growth, development and physiology, including cell division, chloroplast differentiation and delay of senescence but the interaction with other organisms, including pathogens.Dec 19, 2019
How does ethylene regulate growth?
The gaseous hormone ethylene plays a key role in plant growth and development, and it is a major regulator of stress responses. It inhibits vegetative growth by restricting cell elongation, mainly through cross-talk with auxins.Apr 11, 2018