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Nitric oxide induced by polyamines involves antioxidant systems against chilling stress in tomato (Lycopersicon esculentum Mill.) seedling

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2016年第12期17卷 916-930页

作者： Qian-nan DIAO Yong-jun SONG Dong-mei SHI Hong-yan QI Collaborative Innovation Center of Protected Vegetable Surround Bohai Gulf Region Key Laboratory of Protected Horticulture of Ministry of Education and Liaoning Province College of Horticulture Shenyang Agricultural University

Polyamines（PAs） and nitric oxide（NO） are vital signals in modulating plant response to abiotic stress. However, to our knowledge, studies on the relationship between NO and PAs in response to cold stress in tomato are limited. Accordingly, in this study, we investigated the effects of putrescine（Put） and spermidine（Spd） on NO generation and the function of Spd-induced NO in the tolerance of tomato seedling under chilling stress. Spd increased NO release via the nitric oxide synthase（NOS）-like and nitrate reductase（NR） enzymatic pathways in the seedlings, whereas Put had no such effect. Moreover, H2O2 might act as an upstream signal to stimulate NO production. Both exogenous NO donor（sodium nitroprusside（SNP）） and Spd enhanced chilling tolerance in tomato, thereby protecting the photosynthetic system from damage. Compared to chilling treatment alone, Spd enhanced the gene expressions of superoxide dismutase（SOD）, peroxidase（POD）, catalase（CAT）, and ascorbate peroxidase（APX）, and their enzyme activities in tomato leaves. However, a scavenger or inhibitor of NO abolished Spd-induced chilling tolerance and blocked the increased expression and activity due to Spd of these antioxidant enzymes in tomato leaves under chilling stress. The results showed that NO induced by Spd plays a crucial role in tomato＇s response to chilling stress.

关键词： Antioxidant enzymes chilling tolerance Hydrogen peroxide Nitric oxide Spermidine Tomato

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Protection of ultrastructure in chilling-stressed banana leaves by salicylic acid

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Journal of Zhejiang University-Science B(Biomedicine & Biotechnology) 2007年第4期8卷 277-282页

作者： KANG Guo-zhang WANG Zheng-xun XIA Kuai-fei SUN Gu-chou National Engineering Research Centre for Wheat Henan Agricultural University Zhengzhou 450002 China South China Institute of gotany Chinese Academy of Sciences Guangzhou 510650 China Department of Biology Guangzhou University Guangzhou 510405 China College of Life Science Zhongshan University Guangzhou 510275 China

Objective： chilling tolerance of salicylic acid （SA） in banana seedlings （Musa acuminata cv., Williams 8818） was investigated by changes in ultrastructure in this study. Methods： Light and electron microscope observation. Results： Pretreatment with 0.5 mmol/L SA under normal growth conditions （30/22 ℃） by foliar spray and root irrigation resulted in many changes in ultrastructure of banana cells, such as cells separation from palisade parenchymas, the appearance of crevices in cell walls, the swelling of grana and stromal thylakoids, and a reduction in the number of starch granules. These results implied that SA treatment at 30/22 ℃ could be a type of stress. During 3 d of exposure to 7 ℃ chilling stress under low light, however, cell ultrastructure of SA-pretreated banana seedlings showed less deterioration than those of control seedlings （distilled water-pretreated）. Conclusion： SA could provide some protection for cell structure of chilling-stressed banana seedling.

关键词： Banana (Musa acuminata cv. Williams 8818) chilling tolerance Salicylic acid Ultrastructure

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Comparative transcriptome profiling of chilling stress responsiveness in two contrasting rice genotypes

Comparative transcriptome profiling of chilling stress respo...

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从植物科学到农业发展——2012全国植物生物学大会

作者： Ting Zhang~(1,2),Xiuqin Zhao~2,Wensheng Wang~2,Yajiao Pan~2,Liyu Huang~2,Xiaoyue Liu~2,Ying Zong~2,Linghua Zhu~2,Daichang Yang~(1*),Binying Fu~(2*) 1 Engineering Research Center for Plant Biotechnology and Germplasm Utilization,Ministry of Education,State Key Laboratory of Hybrid Rice,College of Life Sciences,Wuhan University,Wuhan, 430072. 2 Institute of Crop Sciences/National Key Facility for Crop Gene Resources and Genetic Improvement, Chinese Academy of Agricultural Sciences,Beijing,100081.

Rice is sensitive to chilling stress,especially at the seedling *** elucidate the molecular genetic mechanisms of chilling tolerance in rice,comprehensive gene expressions of two rice genotypes(chilling-tolerant LTH and chilling-sensitive IR29) with contrasting responses to chilling stress were comparatively *** revealed a differential constitutive gene expression prior to stress and distinct global transcription reprogramming between the two rice genotypes under time-series chilling stress and subsequent recovery conditions.A set of genes with higher basal expression were identified in chilling-tolerant LTH compared with chilling-sensitive IR29,indicating their possible role in intrinsic tolerance to chilling *** chilling stress,the major effect on gene expression was up-regulation in the chilling- tolerant genotype and strong repression in chilling-sensitive *** responses to chilling stress in both genotypes featured commonly up-regulated genes related to transcription regulation and signal transduction, while functional categories for late phase chilling regulated genes were diverse with a wide range of functional adaptations to continuous *** the cessation of chilling treatments,there was quick and efficient reversion of gene expression in the chilling-tolerant genotype,while the chilling-sensitive genotype displayed considerably slower recovering capacity at the transcriptional *** addition,the detection of differentially-regulated TF genes and enriched cis-elements demonstrated that multiple regulatory pathways,including CBF and MYBS3 regulons,were involved in chilling stress tolerance.A number of the chilling-regulated genes identified in this study were co-localized onto previously fine-mapped cold-tolerance-related QTLs,providing candidates for gene cloning and elucidation of molecular mechanisms responsible for chilling tolerance in rice.

关键词： Rice chilling tolerance differentially expressed genes CBF regulon QTL

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Gene expression changes in response to chilling stress in maize

Gene expression changes in response to chilling stress in ma...

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中国遗传学会植物遗传和基因组学专业委员会2009年学术研讨会

作者： Guang Yang,and Yaping Yuan~* College of Plant Sciences,Jilin University,Changchun 130062,China

Maize(Zea mays L.) is the crop with the largest cultivated area in the Northeast of China. chilling stress is one of the most important abiotic stress limiting growth,development and distribution of *** the present study,to understand the underlying molecular mechanism in response to low temperature,we investigated the expression of genes in maize

关键词： cDNA-AFLP chilling tolerance Gene expression Maize

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