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Title: Physiological and morphological traits of Maize hybrids under saline water irrigation
Authors: Devi, B Nandhini
Chitdeshwari, T
Keywords: Abiotic stress;DMP;Gas exchange parameters;Growth attributes;Osmotic stress;Soil salinity;Tolerance;Zea mays L.
Issue Date: Mar-2019
Publisher: NISCAIR-CSIR, India
Abstract: Salinity is one of the common abiotic stresses affecting crop growth and yield considerably. Hence, we conducted a pot culture experiment to evaluate the changes in various physiological and morphological traits of six maize hybrids (CO 6, CO 7, CO 8, CO 10, NK 6240 and 900 M Gold) under saline water irrigation. Saline water having a natural EC of 0.6, 3.2, 4.8, 6.7 and 8.9 dSm-1 was used for irrigating the crops up to 30 days. Nine seedling traits viz., shoot length, root length, shoot dry weight, root dry weight, total dry weight, photosynthetic rate, stomatal conductance, transpiration rate and chlorophyll content were measured. Based on the better physiological and morphological traits, dry matter productivity (DMP) and gas exchange parameters, the maize hybrids CO 6 and CO 7 have been identified as saline water tolerant up to an ECiw of 4.8 dSm-1. However, CO 8 was observed as salt sensitive as it recorded poor growth and photosynthetic parameters. Results suggest that DMP and gas exchange parameters would be useful traits for identifying salinity tolerance in maize hybrids at seedling stage.
Page(s): 188-194
ISSN: 0975-1009 (Online); 0019-5189 (Print)
Appears in Collections:IJEB Vol.57(03) [March 2019]

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