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    Home > Food News > Food Articles > The molecular regulatory mechanism of plant shade protection reaction is revealed

    The molecular regulatory mechanism of plant shade protection reaction is revealed

    • Last Update: 2021-03-16
    • Source: Internet
    • Author: User
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    , the Institute of Biotechnology of the Chinese Academy of Agricultural Sciences, in cooperation with the South China Agricultural University, revealed that the molecular mechanism of plants balancing growth and defense response by fusing photosensitive pigment signaling and jasmine acid signaling in shade environment is of great theoretical significance for the cultivation of dense crops. The findings were published online in Plant Cell.
    increase the yield of crops by increasing the dense planting. However, excessive increase in planting density can cause plants to block each other from light. In order to compete with the surrounding plants for more light, the plants will show that the stalk elongity speed is accelerated, creating a shade-avoidance reaction, and eventually flowering ahead of time to complete reproductive reproduction. In addition, excessive dense planting causes plants to allocate more resources to growth, reducing plants' defenses against external pathogens and adversely affecting plants. Therefore, in the process of breeding densely planted crops, breeders are needed to cultivate new varieties of crops that can withstand shade protection, so as to maintain a good balance between growth and defense.
    plants need to make a decision when growing in an unfavourable environment of shade: growth or defense? How to allocate limited resources reasonably to two relative events is an important choice for plants. Past studies have found that the rapid growth of plants in shade is regulated by photosensitive pigments and a variety of hormones, but the interaction between these signaling pathways regulates molecular mechanisms.
    now, researchers have found that two proteins, FHY3 and FAR1, an important factor in light signal transducing, play an important role in balancing plant growth and defense when faced with shade. On the one hand, the FHY3 and FAR1 proteins directly regulate the expression levels of shade-shielding genes, on the other hand, they interact with the jasmine acid signaling pathway, thereby inhibiting the excessive growth of plant shade and improving their defenses, ultimately maintaining growth and defense at an appropriate level. (Source: Li Chen, China Science Journal)
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