Connecting proline metabolism and signaling pathways in plant senescence

Frontiers in Plant Science
Lu Zhang, Donald F Becker

Abstract

The amino acid proline has a unique biological role in stress adaptation. Proline metabolism is manipulated under stress by multiple and complex regulatory pathways and can profoundly influence cell death and survival in microorganisms, plants, and animals. Though the effects of proline are mediated by diverse signaling pathways, a common theme appears to be the generation of reactive oxygen species (ROS) due to proline oxidation being coupled to the respiratory electron transport chain. Considerable research has been devoted to understand how plants exploit proline metabolism in response to abiotic and biotic stress. Here, we review potential mechanisms by which proline metabolism influences plant senescence, namely in the petal and leaf. Recent studies of petal senescence suggest proline content is manipulated to meet energy demands of senescing cells. In the flower and leaf, proline metabolism may influence ROS signaling pathways that delay senescence progression. Future studies focusing on the mechanisms by which proline metabolic shifts occur during senescence may lead to novel methods to rescue crops under stress and to preserve post-harvest agricultural products.

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Citations

Dec 16, 2017·Antioxidants & Redox Signaling·Shelbi L Christgen, Donald F Becker
Oct 11, 2017·Antioxidants & Redox Signaling·John J Tanner
May 3, 2019·Journal of Experimental Botany·Salvador González-GordoFrancisco J Corpas
May 22, 2019·The Journal of Biological Chemistry·Michelle YamJianhai Du
Dec 7, 2019·Journal of Experimental Botany·Younes DelleroAlain Bouchereau
Jul 3, 2019·International Journal of Molecular Sciences·Mirza HasanuzzamanMasayuki Fujita
Oct 11, 2017·Antioxidants & Redox Signaling·James M Phang
Oct 20, 2017·Frontiers in Plant Science·Afsana IslamMichael T McManus
Jul 23, 2020·Plant Signaling & Behavior·Zhi-Qiang YanLun-Guang Yao
Jul 29, 2020·International Journal of Molecular Sciences·Kalaivani K Nadarajah
Jan 9, 2020·Plant Physiology and Biochemistry : PPB·Mahmoud M Y MadanyAhmed M Saleh
Feb 12, 2021·Plant Science : an International Journal of Experimental Plant Biology·Pengfei WangHaijiang Chen
Jun 21, 2018·Biophysical Journal·David A KorasickJohn J Tanner
Aug 10, 2021·Trends in Plant Science·María E AlvarezLászló Szabados
Aug 1, 2021·Journal of Experimental Botany·Yao ZhengArnould Savouré

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