Amazing stuff! How agile plants can be!
"... The study ... offers a new understanding of how gene activity directs plant growth, and how quickly plants respond to their environment—with shifting light conditions triggering molecular changes in as little as five minutes. The findings provide insights into how to increase yield and safeguard world food production as climate change shrinks the planet’s arable land. ...
“This paper shows, in high resolution, how plants respond to subtle environmental changes on the cellular level,” ...
“This paper shows, in high resolution, how plants respond to subtle environmental changes on the cellular level,” ...
“Our study reveals the mechanism in close detail and also shows the rapid nature of the response. We found that when PIF7 is active, it binds to DNA. And our data indicate that this leads to the removal of H2A.Z from the DNA. Subsequently, genes are activated, and then this induces growth, to outcompete the neighboring plants,” ...
The speed of the process was unexpected ... in addition to triggering the stress response within five minutes, the histone landscape also recovered quickly when shade was removed.
“When we removed shade, the levels of H2A.Z at PIF7 target genes went back to normal within 30 minutes,” ...""... We found that PIFs [Phytochrome-Interacting Factors] act rapidly to reshape the H2A.Z and H3K9ac epigenetic landscape in response to a change in light quality. ... Thus, we describe a PIF–INO80 regulatory module that is an intermediate step for allowing plants to change their growth trajectory in response to environmental changes."
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