Статья

Physiological Response to Salt (NaCl) Stress in Selected Cultivated Tetraploid Cottons

Sarah M. HigbieDepartment of Plant and Environmental Sciences, New Mexico State University, P.O. Box 30003, Las Cruces, NM 88003, USAFei WangDepartment of Plant and Environmental Sciences, New Mexico State University, P.O. Box 30003, Las Cruces, NM 88003, USAJ. McD. StewartDepartment of Crop, Soil, and Environmental Sciences, University of Arkansas, Fayetteville, AR 72701, USATracy M. SterlingDepartment of Entomology, Plant Pathology, and Weed Science, New Mexico State University, MSC 3BE, Skeen Hall, Las Cruces, NM 88003, USAWilliam C. LindemannDepartment of Plant and Environmental Sciences, New Mexico State University, P.O. Box 30003, Las Cruces, NM 88003, USAE. HughsSouthwestern Cotton Ginning Research Laboratory, USDA-ARS, Mesilla Park, NM 88047, USAJinfa ZhangDepartment of Plant and Environmental Sciences, New Mexico State University, P.O. Box 30003, Las Cruces, NM 88003, USA

2010en

ABI

Аннотация

In the southwestern and western Cotton Belt of the U.S. soil salinity can reduce cotton productivity and quality. This study was conducted to determine the physiological responses of six genotypes including five Upland cotton ( Gossypium hirsutum L.) cultivars and one Pima cotton line ( G. barbadense L.) to NaCl under greenhouse conditions. Seeds were germinated and grown for 14 days prior to salt treatment (daily 100 ml of 200 mM NaCl) for 21 days. Compared with the control (daily 100 ml tap water), the NaCl treatment significantly reduced plant height, leaf area, fresh weight, and dry weight. The NaCl stress also significantly increased leaf chlorophyll content, but did not affect leaf fluorescence. Of the six genotypes, Pima 57-4 and SG 747 had the most growth reduction, and were most sensitive to NaCl; DP 33B, JinR 422 and Acala Phy 72 had the least growth reduction and were most NaCl tolerant. Although all the six genotypes under the salt treatment had significantly higher Na and Cl accumulation in leaves, SG 747 and Pima 57-4 accumulated more Na and Cl than DP 33B. Increases in leaf N, Zn, and Mn concentrations were also observed in the NaCl-treated plants. While leaf P, Ca, and S concentrations remained unchanged overall in the genotypes tested, leaf K, Mg, Fe, and Cu concentrations significantly decreased during salt stress. Reduction in plant height is a simple, easy, sensitive, non-destructive measurement to evaluate salt tolerance in cotton.

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Идентификаторы

DOI: 10.1155/2010/643475

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