Salt and drought tolerance of sugarcane under iso-osmotic salt and water stress: growth, osmolytes accumulation, and antioxidant defense

Journal of plant interactions

article

Vikas Yadav Patade¹  Sujata Bhargava²  Penna Suprasanna¹ 

[1] Functional Plant Biology Section, Nuclear Agriculture and Biotechnology Division, Bhabha Atomic Research Centre;Botany Department, University of Pune;Molecular Biology and Genetic Engineering Division, Defence Institute of Bio-Energy Research

关键词: sugarcane;    iso-osmotic;    salt;    PEG;    osmotic adjustment;    oxidative damage;    antioxidant enzymes;   

DOI  :  10.1080/17429145.2011.557513

学科分类：纳米科学和纳米技术

来源: Taylor & Francis

【 摘 要 】

In order to discriminate between the ionic and osmotic components of salt stress, sugarcane ( Saccharum officinarum L. cv. Co 86032) plants were treated with salt-NaCl or polyethylene glycol-PEG 8000 solutions (−0.7 MPa) for 15 days. Both the salt and PEG treatments significantly reduced leaf width, number of green leaves, and chlorophyll stability index. Osmotic adjustment (OA) indicated that both the stresses led to significant accumulation of osmolytes and sugars. Salt stressed plants appeared to use salt as an osmoticum while the PEG stressed plants showed an accumulation of sugars. Oxidative damage to membranes was not severe in plants subjected to salt or PEG stress. The salt stressed plants showed an increase in the activities of superoxide dismutase (SOD) and ascorbate peroxidase (APX), while PEG stress led to an increase in SOD but not APX activity as compared to the control. Thus, results indicate that the iso-osmotic salt or PEG stress led to differential responses in plants especially with respect to growth, OA, and antioxidant enzyme activities.

【 授权许可】

CC BY|CC BY-NC