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- Title
Effects of exogenous nitric oxide on highbush blueberry PSphotochemical activity and antioxidant system under high temperature stress.
- Authors
Wei Hai-Rong; Meng Yan-Ling; Sun Yang; Liu Qing-Zhong
- Abstract
Taking the test tube 'Duke' highbush blueberry (Vaccinium corymbosum) seedlings having been transplanted to the field for 6 months as test materials, this paper studied the effects of exogenous nitric oxide (NO) on their growth, PS-photochemical activity, and antioxidant system under high temperature stress. Applying 0.2, 0.5, and 1.0 mmol·L-1 of exogenous sodium nitroprusside (SNP) could alleviate the decrease of maximum photochemical efficiency (Fv / Fm), actual photochemical efficiency under light(ΦPSII), photochemical quench (qP), and nonphotochemical quench (NPQ) caused by high temperature, and prevented the damage of high temperature on photosynthetic apparatus. Comparing with the control, treatments NO decreased the leaf membrane permeability and MDA content, increased the SOD and CAT activities significantly, and promoted proline accumulation. Appropriate concentration SNP could significantly alleviate the damage of high temperature stress on highbush blueberry seedlings, and 0.5 mmol∙L-1 of SNP had the most satisfactory effect.
- Subjects
VACCINIUM membranaceum; MOLECULAR phytochemicals; EFFECT of heat on plants; HIGH temperatures; NITRIC oxide; ANTIOXIDANTS
- Publication
Yingyong Shengtai Xuebao, 2010, Vol 21, Issue 10, p2529
- ISSN
1001-9332
- Publication type
Article