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Electronic Journal of Plant Breeding
Year : 2018, Volume : 9, Issue : 4
First page : ( 1461) Last page : ( 1468)
Online ISSN : 0975-928X.
Article DOI : 10.5958/0975-928X.2018.00181.3

A comparative analysis of transpiration response to atmospheric increasing vapor pressure deficit conditions in cereal crops

Karthika G.1,2, Choudhary Sunita2, ganesan Meenakshi1, Kholova Jana2, Vadez Vincent2,3,*

1Centre for Plant Breeding and Genetics, Tamil Nadu Agricultural University, Coimbatore, India

2International Crops Research Institute for the Semi-Arid Tropics, Hyderabad, India

3Institut de Recherche pour le Development (IRD), Université de Montpellier, UMR DIADE, 911 Avenue Agropolis, BP 64501, 34394, Montpellier, Cedex 5, France.

*E-Mail: vincent.vadez@ird.fr, v.vadez@cgiar.org

Online published on 11 January, 2019.

Abstract

Plant adaptation to drought depends on both inherited and adaptive characteristic of water conservative traits. Expression of limited transpiration rate (TR) under high vapor pressure deficit (VPD) conditions could be one of the potential sources of soil water conservation for drought tolerance. Large genetic variation for limited TR has been identified in the comparison of three major C4 cereals viz., maize, pearl millet and sorghum under elevating VPD. The total amount of water transpired under elevating VPD by these three cereals not found dependent on leaf area, in fact, it was reflected more by the variation in transpiration rate. Pearl millet showed better adaptation of limitation of TR than maize and sorghum under high VPD regimes.

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Keywords

Cereals, transpiration, vapor pressure deficit, breakpoint and variability.

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