Mechanism of water-logging tolerance in pigeonpea

Hingane, A J and Saxena, K B and Patil, S B and Sultana, R and Srikanth, S and Mallikarjuna, N and Vijaykumar, R and Kumar, C V S (2015) Mechanism of water-logging tolerance in pigeonpea. Indian Journal of Genetics and Plant Breeding, 75 (2). pp. 208-214. ISSN 0019-5200

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Abstract

A study was undertaken to identify the morphophysiological traits associated with water-logging tolerance in pigeonpea [Cajanus cajan L. (Millsp.)].The formation of aerenchyma cells, lenticels, and adventitious roots in the tolerant genotypes were found to be associated with waterlogging tolerance in pigeonpea. The tolerant genotypes, namely, ICP 5028, ICPH 2431, ICPL 87119, ICPH 2740, ICPL 149, ICPL 20241, and MAL15, exhibited varying responses to hypoxic conditions. Formation of aerenchymatous cells was common in all the water-logging tolerant genotypes. Besides this, five tolerant genotypes (ICP 5028, ICPH 2431, ICPL 87119, ICPH 2740 and MAL 15) developed lenticels, while ICPL 149 and ICPL 20241 formed prominent adventitious roots. None of these traits was present in the susceptible genotypes. These traits developed only when exposed to water-logging stress and facilitated oxygen supply from stem to roots helping in respiration of the suffering plants. Potential breeding strategies to develop pigeonpea genotypes with enhanced levels of waterlogging tolerance are discussed.

Item Type: Article
Divisions: RP-Grain Legumes
CRPS: CGIAR Research Program on Grain Legumes
Uncontrolled Keywords: Pigeonpea, Water logging, Aerenchyma, Lenticels, Adventitious roots, Tolerance
Subjects: Mandate crops > Pigeonpea
Depositing User: Mr B K Murthy
Date Deposited: 30 Jul 2015 06:35
Last Modified: 30 Jul 2015 06:35
URI: http://oar.icrisat.org/id/eprint/8902
Official URL: http://dx.doi.org/10.5958/0975-6906.2015.00032.2
Projects: UNSPECIFIED
Funders: UNSPECIFIED
Acknowledgement: UNSPECIFIED
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