Exogenous Spermidine Affected Leaf Characteristics and Growth of Common Bean Under Water Deficit Conditions     

Shahram Torabian  Mohammad Reza Shakiba  Adel Dabbagh Mohammadi Nasab  Mahmood Toorchi 《Communications in Soil Science and Plant Analysis》2018,49(11):1289-1301

In order to investigate the effects of exogenous spermidine on water limitation-induced damage on common bean (Phaseolus vulgaris L.) genotypes, a field experiment was conducted over two growth seasons. The experiment was arranged as a split-split plot design and three replications. Treatments were three water stress levels (non-stress, moderate and severe stress), three bean genotypes (Akhtar, Pak and COS12) and two spermidine levels (control and foliar application). The results showed that water stress reduced markedly leaf relative water content, SPAD values, specific leaf area, leaf area index, plant height, relative growth rate, shoot dry weight and grain yield; however, increased leaf density, leaf relative electrolyte leakage, stomatal density, leaf angle and leaf temperature of bean genotypes. Spermidine application increased relative water content, SPAD values, leaf area, leaf area index, shoot dry weight and grain yield. Overall, exogenous spermidine usage as a free radical scavenger counteracted deleterious water deficit effects.  相似文献   

Silicon alleviates long-term copper toxicity and influences gene expression in Nicotiana tabacum     

Christopher Flora  Sushant Khandekar  Jennifer Boldt 《Journal of plant nutrition》2019,42(8):864-878

Silicon (Si) is beneficial for plant growth and aids in stress tolerance. In this study, the effects of Si on long-term copper (Cu) toxicity in the low Si accumulator Nicotiana tabacum were evaluated. Silicon supplementation alleviated growth inhibition in roots and shoots of N. tabacum exposed to Cu toxicity. Alleviation of Cu toxicity correlated with increased Si accumulation in roots and leaves, suggesting N. tabacum contains a stress-regulated mechanism for Si transport. Root Cu concentration decreased in Si-supplemented plants exposed to Cu toxicity. Interestingly, Copper Transporter 1 (COPT1) expression decreased in roots of Si-supplemented plants exposed to Cu toxicity, which may contribute to Cu uptake reduction. Decreases in ethylene (ET) biosynthetic gene expression were previously implicated in Si-mediated stress alleviation. In the present study, Si-mediated alleviation of Cu toxicity corresponded with increased ET biosynthetic gene expression.  相似文献   

多胺在畜禽营养中的作用     

董国忠  李周权 《中国饲料》2007,(11):27-29

本文就畜禽体内多胺的来源及代谢,多胺对畜禽小肠形态、功能以及畜禽生长性能的影响进行综述。  相似文献   

水分胁迫对番茄幼苗叶片和根系中多胺代谢的影响   总被引：3，自引：0，他引：3  

张志新  邹志荣  张春梅 《西北农林科技大学学报(自然科学版)》2009,37(7):97-102

【目的】探讨番茄体内多胺代谢与抗旱性的关系,为植物抗旱性的深入研究提供理论依据。【方法】以番茄幼苗为材料,用不同质量浓度(0(CK),50,75,100 g/L)的聚乙二醇(PEG6000)模拟水分胁迫,研究不同水分胁迫条件下番茄幼苗叶片和根系中多胺代谢的变化。【结果】水分胁迫影响番茄幼苗叶片和根系中的多胺代谢,随胁迫时间的延长,番茄幼苗叶片和根系中游离态腐胺(Put)、亚精胺(Spd)、精胺(Spm)及精氨酸脱羧酶(ADC)、鸟氨酸脱羧酶(ODC)、多胺氧化酶(PAO)活性均呈先上升后下降的趋势,且除PAO外上升幅度随胁迫程度加重而增大。番茄幼苗叶片和根系中ADC、ODC活性与Put含量极显著正相关,水分胁迫下ADC、ODC都参与番茄幼苗Put的合成代谢;PAO活性与Spd、Spm含量变化趋势相似且极显著相关,叶片与根系中的多胺代谢显著相关。【结论】水分胁迫下番茄幼苗中多胺代谢活跃,且不同水分胁迫处理间多胺代谢差异显著,多胺代谢与番茄抗旱性间关系密切。  相似文献   

谷光甘肽对冷藏枇杷果实木质化相关生理指标的影响*     

吴锦程  陈伟健  谭莉  林德贵  卢海霞 《云南农业大学学报(自然科学版)》2008,23(5):652-657

  以“解放钟”枇杷(Eriobotrya japonica LindlcvJiefangzhong)为试材, 研究外源还原型谷胱甘肽(glutathione, GSH)对6 ℃冷藏枇杷果实苯丙氨酸解氨酶(phenylalanine ammonia lyase, PAL)、多酚氧化酶(polyphenol oxidase , PPO)、4-香豆酸辅酶A连接酶(4 coumarate coenzyme A ligase, 4 CL)、肉桂醇脱氢酶(cinnamyl alcohol dehydrogenase, CAD)、过氧化物酶(peroxidase, POD)和多胺氧化酶(polyamine oxidase, PAO)活性以及可溶性糖含量变化与果实木质化的关系。结果表明, 外源GSH处理通过抑制冷藏枇杷果实中PAL,POD和PAO活性上升, 从而抑制果实木质素的形成,并延缓可溶性糖的下降; 但GSH处理对果实PPO,CAD和4 CL酶活力影响较小, 它们可能在枇杷果实木质化中不起主要作用。GSH具有减缓冷藏枇杷果实木质化的作用, 其中以10g/L和15g/L的GSH所处理的枇杷果实木质化程度较低。关键词：枇杷; 木质化; 谷胱甘肽(GSH); 苯丙氨酸解氨酶(PAL); 过氧化物酶(POD); 多胺氧化酶(PAO)100, China  相似文献   

谷光甘肽对冷藏枇杷果实木质化相关生理指标的影响     

吴锦程  陈伟健  谭莉  林德贵  卢海霞 《云南农业大学学报(自然科学版)》2008,23(5)

以"解放钟"枇杷(Eriobotrya japonicaLindl.cv.Jiefangzhong)为试材,研究外源还原型谷胱甘肽(glu-tathione,GSH)对6℃冷藏枇杷果实苯丙氨酸解氨酶(phenylalanine ammonia-lyase,PAL)、多酚氧化酶(poly-phenol oxidase,PPO)、4-香豆酸辅酶A连接酶(4-coumarate coenzyme A ligase,4-CL)、肉桂醇脱氢酶(cin-namyl alcohol dehydrogenase,CAD)、过氧化物酶(peroxidase,POD)和多胺氧化酶(polyamine oxidase,PAO)活性以及可溶性糖含量变化与果实木质化的关系。结果表明,外源GSH处理通过抑制冷藏枇杷果实中PAL,POD和PAO活性上升,从而抑制果实木质素的形成,并延缓可溶性糖的下降;但GSH处理对果实PPO,CAD和4-CL酶活力影响较小,它们可能在枇杷果实木质化中不起主要作用。GSH具有减缓冷藏枇杷果实木质化的作用,其中以1.0 g/L和1.5 g/L的GSH所处理的枇杷果实木质化程度较低。  相似文献   

水稻灌浆期耐热性的品种间差异及其与剑叶光合特性和内源多胺的关系   总被引：12，自引：0，他引：12  

黄英金  罗永锋 《中国水稻科学》1999,13(4):205-210

 对65个不同来源的早籼稻品种进行了灌浆期耐热性的鉴定研究,并比较了耐热性相差很大的品种灌浆期高温胁迫前后的生理反应。结果表明：秕粒率、实粒重、整精米率、垩白度、蛋白质含量的胁迫指数可作为水稻品种灌浆期耐热性田间直接鉴定的 5个指标,可采用隶属函数值法对各品种的耐热性进行综合评价;不同品种的耐热性存在相当大的差异,筛选出了几个耐热性很强的品种;高温胁迫严重影响水稻的光合能力,但耐热性强的品种剑叶的光合速率高温胁迫后下降幅度明显较小,胁迫解除后恢复的程度也更高,叶绿素含量、RuBPc 活性及内源多胺含量的变化趋势与光合速率相一致,是水稻耐高温逼熟的重要生理特征。  相似文献   

油菜苗期根系缺硼对保护酶的变化及多胺积累的影响   总被引：1，自引：0，他引：1  

XIAO Feng-Hui 《土壤圈》1998,8(3):229-236

The effects of boron deficiency on the membrane permeability,the lipid peroxidation of membrane ,the activities of the protective enzymes and the accumulation of polyamines in the roots of rape (Brassica napus L.cv Zhongyou 821)plants were examined using solution culture experiment .Compared to the 20 mmol B m^-3 treatment ,boron-deficient treatment( 2 mmol B m^-3) decreased root dry weight and increased the rate of solute leakage and malondialdehyde (MDA) concentration in the roots of rape.Similar patterns of change were observed in the level of lipid peroxidation (MDA concentration) and the rate of solute leakage under boron deficiency.Results suggested that a signifcant alteration of membrane composition had occurred under B deficiency.The concentration of putrescin and the ration of putrescine to spermidine spermine in the roots of rape increaed significantly,and the activities of superoxide dismutase and catalase decreased in the roots of rape during B deficiency,But peroxidase activity in root of B-defcient plant was higher than that of control plant.  相似文献   

二个砂梨品种花芽分化期芽内内源多胺含量的动态变化     

李璇 《中国果业信息》2013,42(2)

以不同成花能力的砂梨品种新水(Pyrus serotina cv.Shinsui)和丰水(Pyrus serotina cv. Housui)为试材,分析了2个品种花芽分化期新梢和短枝芽游离态和束缚态多胺含量的变化,结果表明：在采样期内,砂梨新梢和短枝芽中5种内源多胺以Put、Spd和Spm含量较高,供试芽内源多胺含量高低为丰水梨﹥新水梨,说明在砂梨花芽分化中,内源多胺含量与品种成花能力密切相关。  相似文献   

Putrescine,spermidine, and spermine play distinct roles in rice salt tolerance          下载免费PDF全文

Md Azizul ISlam  PANG Jin-huan  MENG Fan-wei  LI Ya-wen  XU Ning  YANG Chao  LIU Jun 《农业科学学报》2020,19(3):643-655

  相似文献