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Open AccessArticle

Altered Expression of OsAAP3 Influences Rice Lesion Mimic and Leaf Senescence by Regulating Arginine Transport and Nitric Oxide Pathway

by 1,†, 2,†, 3 and 1,3,*
1
Key Laboratory of Plant Resource Conservation and Germplasm Innovation in Mountainous Region (Ministry of Education), College of Agricultural Sciences, Guizhou University, Guiyang 550025, China
2
Xiamen Plant Genetics Key Laboratory, School of Life Sciences, Xiamen University, Xiamen 361102, China
3
Hubei Engineering Research Center of Viral Vector, Wuhan University of Bioengineering, Wuhan 430415, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editors: Raffaele Capasso and Yasuhito Sakuraba
Int. J. Mol. Sci. 2021, 22(4), 2181; https://doi.org/10.3390/ijms22042181
Received: 25 January 2021 / Revised: 19 February 2021 / Accepted: 20 February 2021 / Published: 22 February 2021
(This article belongs to the Special Issue Molecular Mechanisms of Leaf Senescence)
Persistent lesion mimic can cause leaf senescence, affecting grain yield in crops. However, knowledge about the regulation of lesion mimic and leaf senescence in crop plants is still limited. Here, we report that the amino acid transporter OsAAP3, a negative regulator of tiller bud elongation and rice grain yield, is involved in lesion mimic and leaf senescence. Altered expression of OsAAP3 can initiate the nitric oxide signaling pathway through excessive accumulation of arginine in rice leaves, influencing ROS accumulation, antioxidant enzymes activities, proline concentration, and malondialdehyde concentration. This finally triggers cell death which ultimately leads to lesion mimic and leaf senescence by regulating the degradation of chloroplast and the expression abundance of components in the photosynthetic pathway. Overall, the results not only provide initial insights into the regulatory role of amino acid transport genes in rice growth and development, but also help to understand the factors regulating the leaf senescence. View Full-Text
Keywords: rice; lesion mimic; leaf senescence; arginine transport; nitric oxide rice; lesion mimic; leaf senescence; arginine transport; nitric oxide
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MDPI and ACS Style

Wei, Q.; Yan, Z.; Xiong, Y.; Fang, Z. Altered Expression of OsAAP3 Influences Rice Lesion Mimic and Leaf Senescence by Regulating Arginine Transport and Nitric Oxide Pathway. Int. J. Mol. Sci. 2021, 22, 2181. https://doi.org/10.3390/ijms22042181

AMA Style

Wei Q, Yan Z, Xiong Y, Fang Z. Altered Expression of OsAAP3 Influences Rice Lesion Mimic and Leaf Senescence by Regulating Arginine Transport and Nitric Oxide Pathway. International Journal of Molecular Sciences. 2021; 22(4):2181. https://doi.org/10.3390/ijms22042181

Chicago/Turabian Style

Wei, Qilang; Yan, Zhenwei; Xiong, Yifan; Fang, Zhongming. 2021. "Altered Expression of OsAAP3 Influences Rice Lesion Mimic and Leaf Senescence by Regulating Arginine Transport and Nitric Oxide Pathway" Int. J. Mol. Sci. 22, no. 4: 2181. https://doi.org/10.3390/ijms22042181

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