What is DR5 GFP?
DR5-GFP expression in vegetative and inflorescence stage pin1 apices. In pin1 , DR5-GFP is highly expressed in differentiated “stem” tissues outside of the meristem, but signal intensity is variable in meristems. Insets show extremes of DR5-GFP expression in pin1 (F).
How many auxin are there?
Five naturally occurring (endogenous) auxins in plants include indole-3-acetic acid, 4-chloroindole-3-acetic acid, phenylacetic acid, indole-3-butyric acid, and indole-3-propionic acid.
What is DR5 promoter?
KEY MESSAGE : Auxin responsive promoter DR5 reporter system is functional in Populus to monitor auxin response in tissues including leaves, roots, and stems. DR5 activity was highest in cortex, suggesting high levels of auxin concentration and/or sensitivity in this tissue.
What is DR5 in plants?
DR5 is an artificially synthesized and highly active auxin-response element that contains seven tandem direct repeats of 11 bp, including the auxin responsive factor gene-binding site (TGTCTC) (Ulmasov et al., 1997).
What is DR5 Arabidopsis?
Does auxin delay senescence?
Since auxin accumulation causes delayed senescence, it should follow that auxin levels decrease during dark-induced senescence. To test this hypothesis, free IAA levels were measured in dark-treated wild-type leaves and it was found that free IAA levels gradually decreased during dark-induced senescence (Fig.
What is the receptor of auxin?
A long-sought hormone receptor has been found. Two recent Nature articles reveal that the F-box protein TRANSPORT INHIBITOR RESPONSE1 (TIR1) binds auxin and responds to the phytohormone even when heterologously expressed in animal systems (Dharmasiri et al., 2005a; Kepinski and Leyser, 2005).
What is Richmond Lang effect?
The Richmond Lang effect was discovered in the year 1967 by Richmond and Lang. According to this effect, the lag of senescence of the leaves and other parts of the plants that occur with the help of application of plant growth regulator cytokinin. The hormone causes the delay in the process of senescence and ageing.
What is the auxin pathway?
The auxin signaling pathway modulates diverse aspects of plant growth and development, such as responses to light and gravity, organ patterning, general root and shoot architecture and vascular development.
