钙对中华猕猴桃果实采后乙烯释放和呼吸的影响

不同浓度ＣａＣｌ２溶液真这渗透处理中华猕猴桃果实采后乙烯释放明显的抑制作用,其中０．５ｍｏｌ／ＬＣａ＾２＋处理尤为显著,采用５天果实人有保持极低水平的内源乙烯,乙烯峰也延迟２－４天出现。     

钙处理对中华猕猴桃果实后熟过程的影响

研究了采用钙处理对中华猕猴桃果实的还原性Ｖｃ,还原糖,蛋白质及半乳糖醛酸酶活性的影响,果实采后钙处理,能抑制ＰＧ酶的活性,延缓果实的衰老,同时保持果实的良好品质,利用中华猕猴桃对钙处理的适宜浓度范围较大的特性,可根据市场不同时期的需求采用不同浓度的钙处理。     

采后钙处理对中华猕猴桃果实过氧化物酶活性、呼吸率及乙烯生成的影响

对中华猕猴桃果实采后进行钙处理,结果表明,适当提高果实钙含量,可以抑制过氧化物酶（POD）活性,降低呼吸率及乙烯生成量,延缓果实衰老。本实验以2％CaCl2处理效果最佳。     

采后钙处理对中华猕猴桃果实过氧化物酶活性,呼吸率及乙烯生成的 …

对中华猕猴桃果实采用进行钙处理,结果表明,适当提高果实钙含量,可以抑制过氧化物酶（ＰＯＤ）活性,降低呼吸率及乙烯生成量,延缓果实衰老,本实验以２％ＣａＣｌ２处理效果最佳。     

钙处理对中华猕猴桃果实后熟过程的影响

研究了采后钙处理对中华猕猴桃果实的还原性Vc、还原糖、蛋白质及半乳精醛酸酶（PG）活性的影响。果实采后钙处理,能抑制PG酶的活性,延缓果实的衰老,同时保持果实的良好品质。利用中华猕猴桃对钙处理的适宜浓度范围较大的特性,可根据市场不同时期的需求采用不同浓度的钙处理。     

猕猴桃果实采后生理研究进展

猕猴桃（Actinidia chinensis Planch.）属于呼吸跃变型果实,采后易软化腐烂,不耐贮藏,如何延长猕猴桃果实贮藏期限已成为猕猴桃产业发展壮大亟待解决的问题。猕猴桃果实采后生理变化强烈影响果实的贮藏期限和果实品质,特别是呼吸作用、乙烯合成及其信号转导系统和果实软化等,并且它们与猕猴桃贮藏保鲜技术的研发与应用密切相关。本文重点从这3个方面就国内外相关研究进展进行综述,并讨论它们对猕猴桃耐贮性的影响,以期为猕猴桃耐贮新品种的培育和贮藏保鲜技术的研发提供理论依据。     

钙与果实采后生理

本文简介钙在果实中的积累、分布、存在形式和生理功能,同时对其在果实采后的生理作用、作用机制以及提高钙含量的可行措施作了归纳。     

采后钙处理对荔枝果实过氧化物酶活性,呼吸率及乙烯生成的影响

荔枝果实采后用钙处理,结果表明,适当地提高果实钙含量,可以抑制过氧化物酶的活性,降低呼吸作用及乙烯的生成,达到延缓衰老的目的。本实验以８％钙处理效果最佳。     

水杨酸对采后苹果果实乙烯生成的抑制作用

室温下用0．1-20mmol·L－1的外源水杨酸浸泡苹果果实的果肉和果皮圆片6h后,其乙烯生成量显著被抑,抑制效果随外源水杨酸浓度的提高而增强。外源水杨酸对种子的乙烯生成也有不同程度的抑制作用。     

采后钙处理对荔枝果实过氧化物酶活性、呼吸率及乙烯生成的影响

荔枝果实采后用钙处理,结果表明,适当地提高果实钙含量,可以抑制过氧化物酶的活性,降低呼吸作用及乙烯的生成,达到延缓衰老的目的。本实验以8％钙处理效果最佳。     

Relationship between Changes in Endogenous Phytohormones and Respiration during Ripe ning and Senescence Period of Cantaloupes (Cucumis mclo var. reticulates)

Respiratory rate and ethylene evolution and the levels of endogenous growth regulating substances were determined before and after harvest during the period of senescence of cantaloupes. It was endogenous ABA which appeared first and accumulated during the maturation period, once it reached a certain threshold level the automatic catalysis of ethylene production was triggered. Like apricot fruits, the ABA-like substances accumulated generously in fruit flesh during maturation and the growth promoting substances disappeared rapidly. This seems internal physiological cause of the cantaloupes corruption.     

钙在控制水果采后病害中的应用

钙在果实生长发育中起着非常重要的作用。果实的许多生理失调和病害都与钙在水果组织中的含量有关。钙处理与气调、热处理、生物防治等联用在减少果实采后病害方面发挥了显著的作用。主要论述钙在控制水果采后病害中的作用机理、钙处理的方法、影响果实钙吸收的因素、以及钙与其它防病方法联用的效果。对于钙处理中可能出现的问题 ,提出了一些可行的解决方法     

Ethylene Production and Respiration of Postharvest Acid Citrus Fruits and Wase Satsuma Mandarin Fruit

Ethylene production and respiratory rate were examined in acid citrus fruits such as yuzu, seedless yuzu and daidai, and wase satsuma mandarin. A large amount of ethylene was produced from four varieties of citrus fruits harvested from May to July but not after September. A rise in ethylene production did not always coincide with a rise in respiratory rate. Excised tissues of fruits contained the ability of ethylene production throughout the developmental stages. The endogenous ethylene level at the ripening stage, reached the maximum when the color changed from green to yellow.     

钙在植物乙烯生成及信号传递中的生理作用

Ｃａ＾２＋对植物乙烯生成的调节与作用位点有关,胞外Ｃａ＾２＋在维持质膜功能的同时,抑制乙烯生成,延缓衰老;过量Ｃａ＾２＋进入胞质,胞内Ｃａ＾２＋促进乙烯生成和衰老。内源ＣａＭ与乙烯生成关系密切,介入了乙烯代谢和外源激素对乙烯的调控。此外,Ｃａ＾２＋是乙烯信号传递所必需的。     

Ethylene insensitive and post-harvest yellowing retardation in mutant ethylene response sensor (boers) gene transformed broccoli (Brassica olercea var. italica)

A mutant broccoli ers (ethylene-response-sensor, boers) gene was obtained through site directed mutagenesis by replacing the isoleucine with phenylanine at the 62th residue. Two plasmids were constructed with this mutant gene regulated by the CaMV 35S promoter together with the nptII (kanamycin resistance gene) coding sequence and hpt (hygromycin resistance gene), respectively, for the pBI-mERSI62F and pSM1H-mERSI62F plasmids. Genetic transformation of the above two constructs via A. tumefaciens has been conducted to evaluate their effects on floret yellowing of harvested broccoli. Over a hundred transformants have been obtained on the selected cotyledon and hypocotyl explants. PCR and Southern analysis demonstrated integration of the transgenes in the transformants. However, through Southern hybridization, we determined that multi-site integration and DNA rearrangements had occurred in most transformants. Morphological and characteristic alternation such as slower plant growth, shorter plant height, easy branching, late bolting, and relative higher mortality in comparison with other transgenes were noted in some transformants. Transgenic lines showing delayed senescence in leaves and floral heads were obtained. The expression of transgene was confirmed by Northern blot analysis. The transformed progenies also showed ethylene insensitivity in seed germination, detached leaves and harvested florets. Nevertheless, in most lines, the yellowing was only delayed 1–2 days.