title: [Effects of exogenous nitric oxide on highbush blueberry PSII photochemical activity and antioxidant system under high temperature stress].
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 II photochemical activity, and antioxidant system under high temperature stress. Applying 0.2, 0.5, and 1.0 mmol x L(-1) of exogenous sodium nitroprusside (SNP) could alleviate the decrease of maximum photochemical efficiency (Fv/Fm), actual photochemical efficiency under light (phi PS II), photochemical quench (q(P)), 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 x L(-1) of SNP had the most satisfactory effect.
authors.affiliation: Shandong Institute of Pomology, Tai' an 271000, Shandong, China. hrwei2004@163.com
authors.forename: Hai-rong
authors.initials: HR
authors.lastname: Wei
authors.forename: Yan-ling
authors.initials: YL
authors.lastname: Meng
authors.forename: Yang
authors.initials: Y
authors.lastname: Sun
authors.forename: Qing-zhong
authors.initials: QZ
authors.lastname: Liu
mesh_terms: D000975:Antioxidants / Q000378:metabolism*; D029798:Blueberry Plants / Q000201:enzymology / Q000254:growth & development / Q000378:metabolism*; D002374:Catalase / Q000378:metabolism; D006358:Hot Temperature; D009569:Nitric Oxide / Q000494:pharmacology*; D045332:Photosystem II Protein Complex / Q000378:metabolism*; D013312:Stress, Physiological; D013482:Superoxide Dismutase / Q000378:metabolism
chemical_list: D000975:Antioxidants; D045332:Photosystem II Protein Complex; D009569:Nitric Oxide; D002374:Catalase; D013482:Superoxide Dismutase