文献类型： 外文期刊

作者： Zhang, Q. ¹ ; Zhang, J. Z. ² ; Chow, W. S. ⁴ ; Sun, L. L. ¹ ; Chen, J. W. ⁵ ; Chen, Y. J. ¹ ; Peng, C. L. ¹ ;

作者机构： 1.S China Normal Univ, Coll Life Sci, Key Lab Ecol & Environm Sci Guangdong Higher Educ, Guangdong Prov Key Lab Biotechnol Plant Dev, Guangzhou 510631, Guangdong, Peoples R China

2.Guangxi Key Lab Biotechnol Crop Genet Improvement, Nanning 530007, Peoples R China

3.Guangxi Acad Agr Sci, Inst Biotechnol, Nanning 530007, Peoples R China

4.Australian Natl Univ, Coll Med Biol & Environm, Res Sch Biol, Div Plant Sci, Canberra, ACT 0200, Australia

5.Yunnan Agr Univ, Dept Crop Sci, Kunming 650201,

关键词： hydrogen peroxide: 7722-84-1;malondialdehyde: 542-78-9;superoxide dismutase: SOD;9054-89-1;EC 1.15.1.1;antioxidant enzyme;reactive oxygen species: ROS;7782-44-7;superoxide radical: 11062-77-4;ascorbate peroxidase: APX;72906-87-7;EC 1.11.1.11;catalase: CAT;9001-05-2;EC 1.11.1.6;DPPH;peroxidase: POD;9003-99-0;EC 1.11.1.7;photochemical efficiency;photosynthetic rate;enzyme activity;crop production;scavenging capability;photosynthesis performance;low temperature influence;cold-tolerance mechanism

期刊名称：PHOTOSYNTHETICA （ 影响因子：3.189； 五年影响因子：3.38 ）

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收录情况： SCI

摘要： Low temperature (LT) is one of the major factors that limit crop production and reduce yield. To better understand the cold-tolerance mechanism in the plantains, a sensitive cultivar Williams (Musa acuminata AAA cv. Williams) and a tolerant cultivar Cachaco (Musa paradisiaca ABB cv. Dajiao) were used. LT resulted in increased malondialdehyde (MDA) content, elevated contents of hydrogen peroxide (H2O2) and superoxide radical (O (2) (center dot-) ), and decreased photochemical efficiency (F-v/F-m) and net photosynthetic rate (P (N)), but cv. Cachaco showed better LT tolerance than cv. Williams. After LT treatment for 120 h, total scavenging capability (DPPH center dot scavenging capability) in Williams showed a significant decrease but no significant alternations was found in Cachaco. Ascorbate peroxidase (APX) and peroxidase (POD) displayed a significant increase but superoxide dismutase (SOD) showed no significant alternations and catalase (CAT) showed a significant decrease in Cachaco after 120 h of LT treatment. All the four antioxidant enzymes above showed a significant decrease in Williams after 120 h of LT treatment. Our results suggest that higher activities of APX, POD, SOD, and DPPH center dot scavenging capability to a certain extent can be used to explain the higher cold tolerance in the plantain, which would provide a theoretical guidance for bananas production and screening cold-resistant variety.