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Version 3.22
Publication Type J
Authors Kumar, A., A. Kumar, C. Lata, S. Kumar, S. Mangalassery, J. P. Singh, A. K. Mishra and D. Dayal
Title Effect of salinity and alkalinity on responses of halophytic grasses Sporobolus marginatus and Urochondra setulosa
Source Indian Journal of Agricultural Sciences
Author Keywords Alkalinity Ionic relations Osmolytes Salinity Sporobolus marginatus Urochondra setulosa salt stress lipid-peroxidation proline wheat photosynthesis tolerance cultivars drought enzymes ozone
Abstract An experiment was conducted in micro-plots filled with sandy loam soil having 14% clay and 0.33% organic carbon to see the responses of halophytic grasses Sporobolus matginatus and Urochondra setulosa collected from the extreme saline-sodic Kachchh plains, Bhuj, Gujarat, India under alkalinity/salinity. Maximum photosynthetic rate was recorded in control treatment. Photosynthetic rate decreased at pH 9.0 + EC 20 dS/m (11.25 and 17.8 mu mol CO2/m(2)/s) in S. matginatus and U. setulosa respectively, along with reduction in stomatal conductance and transpiration rate. In comparison to control, increased accumulation of total soluble sugars and proline may be due to increased osmotic adjustment for both halophytes. Similarly, at mixed stress of pH 9.0 with EC 20 dS/m, the epicuticular wax load increased in both S. matginatus and U. setulosa (24.0 and 40.0 mg/g). A positive correlation of stress was seen with Na(+ )and Cl(- )content while negative correlation with K+ content. Na+ content increased to about 3-7 fold at salinity level, EC 35 dS/m. Similarly, with treatment of mixed stress of pH 9.0 with saline level EC 20dS/m, 3-6 times increase in Na+ with decrease in K+ was observed in S. matginatus and U. setulosa respectively. These grass species maintained better gas exchange properties with higher osmolytes accumulations and balanced ionic relations under high stress conditions of salinity and alkalinity. These attributes might be providing physiological adaptable mechanisms for growth under salt affected environments.
Author Address [Kumar, Ashwani; Kumar, Arvind; Lata, Charu; Kumar, Sourabh; Mangalassery, Shamsudheen; Singh, Jai Prakash; Mishra, Arun Kumar; Dayal, Devi] ICAR Cent Soil Salin Res Inst, Karnal 132001, Haryana, India. [Kumar, Ashwani; Kumar, Arvind; Lata, Charu; Kumar, Sourabh] CSSRI, Karnal, India. [Mangalassery, Shamsudheen; Dayal, Devi] ICAR CAZRI, RRS, Bhuj, Gujarat, India. [Singh, Jai Prakash] ICAR IGFRI, Jhansi, Uttar Pradesh, India. [Mishra, Arun Kumar] ICAR CAZRI, Jodhpur, Rajasthan, India. Kumar, A (reprint author), ICAR Cent Soil Salin Res Inst, Karnal 132001, Haryana, India.; Kumar, A (reprint author), CSSRI, Karnal, India. Ashwani.Kumar1@icar.gov.in; singh.ak92@gmail.com; charusharmabiotech@gmail.com; kskumarsourabh@gmail.com; shamsudheenm@gmail.com; jpsingh.igfri@gmail.com; mishraak17@yahoo.com; devidayal.cazri@gmail.com
ISSN 0019-5022
ISBN 0019-5022
29-Character Source Abbreviation Indian J. Agric. Sci.
Publication Date Aug
Year Published 2018
Volume 88
Issue 8
Beginning Page 1296-1304
Unique Article Identifier WOS:000442387700023
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