New research published in the journal New Phytologist suggests that blocking a negative regulator gene called RRS1 (Robust Root System 1) can enhance root growth in plants, leading to longer root length, longer lateral root length, and larger lateral root density.
發表於，由美國Wiley-Blackwell出版社，代表新植物學家基金會出版之《新植物學家》期刊的新研究暗示，阻斷被稱為粗壯根系1(RRS1：Robust Root System 1)的負調節基因，能促進植物根的生長，從而導致更長的根長度、更長的側根長度及更大的側根密度。
The study shows that inhibiting the expression of RRS1 may improve drought resistance in crops by promoting water absorption. This could be achieved by using natural variants of RRS1 that alter the activity of the protein.
該項研究顯示，抑制RRS1的表現，能藉由促進水分吸收，來提高作物的抗旱性。這可能藉由使用，改變此蛋白質活性之RRS1的天然變體，來實現。
A strong root system allows crops to absorb water and nutrients from the soil, but scientists have little information about the genes that control root development. Recent research published today (March 8) in the journal New Phytologist reveals that blocking a negative regulator gene of root development leads to enhanced root growth in plants.
強大的根系使作物得以，從土壤中吸收水分及養分。不過，科學家們鮮少有，關於控制根發育之基因的資訊。今天(2023年3月8日)發表於《新植物學家》期刊的最新研究揭露，阻斷根發育的一種負調節基因，能導致增強植物根的生長。
The gene, called RRS1, encodes an R2R3-type MYB family transcription factor that activates the expression of another gene (OsIAA3) that inhibits root growth.
該種基因被稱為粗壯根系1的基因，編碼一種R2R3型之成髓細胞增多症(MYB：myeloblastosis)群的轉錄因子。此因子激活，另一種抑制根生長之基因(OsIAA3)的表現。
Knocking out RRS1 in plants led to longer root length, longer lateral root length, and larger lateral root density. Also, a natural variant of RRS1 that changes the activity of the RSS1 protein had a similarly beneficial effect on roots.
剔除植物中的RRS1基因，會導致更長的根長度、更長的側根長度及更大的側根密度。此外，改變RSS1蛋白活性之RRS1基因的天然變異體，對根具有類似的有益作用。
The findings indicate that blocking the normal expression of RSS1 may enhance drought resistance in crops by promoting water absorption.
此些研究結果顯示，阻斷RSS1的正常表現，能藉由促進水分吸收，來增強作物抗旱性。
“RRS1 is a new gene resource for improving root systems and cultivating drought-resistant rice varieties through gene-editing or marker-assisted breeding processes,” said co–corresponding author Zichao Li, PhD, of China Agricultural University, the Sanya Institute of China Agricultural University, and the Hainan Academy of Agricultural Sciences.
共同通訊撰文人，中國農業大學、中國農業大學三亞研究所、海南省農科院的Zichao Li博士宣稱：「RRS1是一種，能藉由基因編輯或標記物輔助之育種過程，來改善根系及培育抗旱之水稻品種的新基因資源。」
網址：https://scitechdaily.com/supercharging-drought-resistance-in-crops-by-blocking-gene-that-inhibits-root-growth/
翻譯：許東榮
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