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您的检索式：作者名="Christopher B.Watkins"
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| 1 | Meta-analysis of the effects of 1-methylcyclopropene(1-MCP)treatment on climacteric fruit ripening显示文摘1-Methylcyclopropene(1-MCP)is an inhibitor of ethylene perception that is widely used to maintain the quality of several climacteric fruits during storage.A large body of literature now exists on the effects of 1-MCP on climacteric fruit ripening for different species and environmental conditions,presenting an opportunity to use meta-analysis to systematically dissect these effects.We classified 44 ripening indicators of climacteric fruits into five categories:physiology and biochemistry,quality,enzyme activity,color,and volatiles.Meta-analysis showed that 1-MCP treatment reduced 20 of the 44 indicators by a minimum of 22%and increased 6 indicators by at least 20%.These effects were associated with positive effects on delaying ripening and maintaining quality.Of the seven moderating variables,species,1-MCP concentration,storage temperature and time had substantial impacts on the responses of fruit to 1-MCP treatment.Fruits from different species varied in their responses to 1-MCP,with the most pronounced responses observed in rosaceous fruits,especially apple,European pear fruits,and tropical fruits.The effect of gaseous 1-MCP was optimal at 1μl/l,with a treatment time of 12–24 h,when the storage temperature was 0℃for temperate fruits or 20℃for tropical fruits,and when the shelf temperature was 20℃,reflecting the majority of experimental approaches.These findings will help improve the efficacy of 1-MCP application during the storage of climacteric fruits,reduce fruit quality losses and increase commercial value. | Jing Zhang Yuanchun Ma Chao Dong Leon A.Terry Christopher B.Watkins Zhifang Yu Zong-Ming(Max)Cheng | 2020 | Horticulture Research2020，7，1： | 7 |
| 2 | The leaf senescence-promoting transcription factor AtNAP activates its direct target gene CYTOKININ OXIDASE 3 to facilitate senescence processes by degrading cytokinins显示文摘Cytokinins(CKs)are a class of adenine-derived plant hormones that plays pervasive roles in plant growth and development including cell division,morphogenesis,lateral bud outgrowth,leaf expansion and senescence.CKs as a“fountain of youth”prolongs leaf longevity by inhibiting leaf senescence,and therefore must be catabolized for senescence to occur.AtNAP,a senescence-specific transcription factor has a key role in promoting leaf senescence.The role of AtNAP in regulating CK catabolism is unknown.Here we report the identification and characterization of AtNAP-AtCKX3(cytokinin oxidase 3)module by which CKs are catabolized during leaf senescence in Arabidopsis.Like AtNAP,AtCKX3 is highly upregulated during leaf senescence.When AtNAP is chemically induced AtCKX3 is co-induced;and when AtNAP is knocked out,the expression of AtCKX3 is abolished.AtNAP physically binds to the cis element of the AtCKX3 promoter to direct its expression as revealed by yeast one-hybrid assays and in planta experiments.Leaves of the atckx3 knockout lines have higher CK concentrations and a delayed senescence phenotype compared with those of WT.In contrast,leaves with inducible expression of AtCKX3 have lower CK concentrations and exhibit a precocious senescence phenotype compared with WT.This research reveals that AtNAP transcription factor˗AtCKX3 module regulates leaf senescence by connecting two antagonist plant hormones abscisic acid and CKs. | Youzhen Hu Bin Liu Huazhong Ren Liping Chen Christopher B.Watkins Su-Sheng Gan | 2021 | Molecular Horticulture2021，1，1： | 0 |
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