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- Title
HPCA1 and HSL3: two plasma membrane proteins that probably cooperate to modulate H<sub>2</sub>O<sub>2</sub> signalling under drought conditions.
- Authors
Mishra, Vipul; Singh, Pooja; Kushwaha, Bishwajit Kumar; Tripathi, Durgesh Kumar; Corpas, Francisco J.; Singh, Vijay Pratap
- Abstract
H2O2 is an essential component of reactive oxygen species (ROS) metabolism and an obligatory side-product of aerobic respiration among plant cells. It is needed for plant growth, development, and stress management along with signalling properties. H2O2 is intricately involved in the stomatal closure during drought stress in conjunction with abscisic acid (ABA), calcium ions (Ca2+), nitric oxide (NO) and hydrogen sulfide (H2S) among others rendering an enhanced plant tolerance. Protein kinases are part of the diverse signalling cascades. Identification of such unique cell surface receptors and proteins for ligand perception and relaying of signals enables us with a better understanding and developing strategies and genetic lines that may combat climatic variations. Here, it points out two recent findings in Arabidopsis: (i) the extracellular H2O2 sensor HPCA1 which is an LRR (leucine-rich-repeat) receptor kinase; and, (ii) the leucine-rich repeat (LRR)-receptor-like kinase (RLK) protein HSL3 which both probably cooperate to modulate H2O2 as a signal in response to drought stress. Therefore, it could be hypothesized that this H2O2 signaling mechanism could function in other types of environmental stresses.
- Publication
Plant Growth Regulation, 2022, Vol 98, Issue 1, p1
- ISSN
0167-6903
- Publication type
Article
- DOI
10.1007/s10725-022-00829-6