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Role and Regulation of Osmolytes and ABA Interaction in Salt and Drought Stress Tolerance

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Relation http://oar.icrisat.org/11199/
https://doi.org/10.1016/B978-0-12-816451-8.00026-5
10.1016/B978-0-12-816451-8.00026-5
 
Title Role and Regulation of Osmolytes and ABA Interaction in Salt and Drought Stress Tolerance
 
Creator Rajasheker, G
Jawahar, G
Jalaja, N
Kumar, S A
Kumari, P H
Punita, D L
Karumanchi, A R
Reddy, P S
Rathnagiri, P
Sreenivasulu, N
Kavi Kishor, P B
 
Subject Abiotic Stress
Drought Tolerance
Molecular Biology
 
Description Abiotic stress conditions lead to the defects in plant growth and development and also reduction in flowering and fertility. Under prolonged stresses, imminent death of the plants has been observed. To cope with such stress conditions, plants accumulate a wide variety of organic solutes called osmolytes. Osmolytes are accumulated in bacteria, lower, and higher plants as a response primarily to abiotic stress. They encompass amino acids such as proline, tertiary sulfonium, and quaternary ammonium compounds like beatines, sugars (trehalose), and polyhydric alcohols (mannitol, sorbitol, pinitol, etc.). Osmolytes are accumulated in the cytoplasm as well as in chloroplasts in certain cases for osmotic adjustment under stress conditions. This enables the plants to absorb water and survive under stress. Out of the many phytohormones that play diverse roles during abiotic stress, abscisic acid (ABA) is an important one and perceived by plants by a core signaling module. As an integral part of signal transduction during stress conditions, ABA and other hormones regulate not only stomatal closure, but also a wide array of gene expressions including osmolyte biosynthetic pathway genes. Many signal molecules like nitric oxide, carbon monoxide, and hydrogen sulfide also play a vital role in osmolyte biosynthesis. Osmolytes appear to have multiple functions during stress such as osmotic adjustment and scavenging of reactive oxygen species (ROS). Thus, generation of ROS and osmolyte accumulation are linked together. This review summarizes the role played by ABA in signal transduction, the role of hormones to regulate osmolyte biosynthesis, and various functions carried out by them.
 
Publisher Elsevier
 
Date 2019
 
Type Book Section
PeerReviewed
 
Format application/pdf
 
Language en
 
Identifier http://oar.icrisat.org/11199/1/6.%20Role%20and%20Regulation%20of%20Osmolytes%20and%20ABA%20Interaction%20in%20Salt%20and%20Drought%20Stress%20Tolerance.pdf
Rajasheker, G and Jawahar, G and Jalaja, N and Kumar, S A and Kumari, P H and Punita, D L and Karumanchi, A R and Reddy, P S and Rathnagiri, P and Sreenivasulu, N and Kavi Kishor, P B (2019) Role and Regulation of Osmolytes and ABA Interaction in Salt and Drought Stress Tolerance. In: Plant Signaling Molecules : Role and Regulation Under Stressful Environment. Elsevier, pp. 417-436. ISBN 978-0-12-816451-8