共查询到19条相似文献，搜索用时 218 毫秒
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温度对采后梨果实多胺,ACC含量,EFE活性和乙烯生成量的影响 总被引：20，自引：2，他引：18
测定了两个日本梨品种菊水和二十世纪在３０、１５和５℃贮藏温度下，多胺，ＡＣＣ含量、ＥＦＥ活性和乙烯释放速率的变化，１．１５和５℃低温可显著抑制梨果实内ＥＦＥ活性，乙烯生成速率显著降低；２．两品种对低温的敏感性存在差异，１５℃低温处理既能减少二十世纪梨的乙烯生成速率，也能抑制乙烯释放高峰的出现，而同样的温度处理仅能减少菊水梨的乙烯生成速率，不能抑制乙烯释放高峰的出现；３．在１５和５℃处理下，两品种果 相似文献
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月季切花开花和衰老进程中乙烯变化类型初探 总被引：53，自引：10，他引：43
以１４个生产用月季切花品种为试材，测定了开花和衰老过程中花朵的乙烯生成量和呼吸强度变化动态。结果表明：（１）乙烯生成量在萨蔓莎、天使、默西德斯、加布里拉和雅典娜５个品种表现为蕾期较低，随外层花瓣展开逐渐增大，在盛开期达到高峰，然后降低，变化动态类似于跃变型切花和跃变型果实；唐娜小姐品种在整个开花和衰老进程中一直保持在较低水平，类似于非跃变型切花和果实的变化动态；坦尼克、黄金时代、金徽章、金牌、红衣主教、红成功、玛丽娜等品种在蕾期较低，随着开花进程逐渐增大，至盛花后期花朵露心时仍在增加，类似于末期上升型果实的变化特点。（２）上述３个类型月季品种的呼吸强度在瓶插期间的变化趋势一致，即花蕾期相对较低，花朵充分展开前迅速升高并出现高峰，然后降低，呈现典型的呼吸跃变类型，同时，萨蔓莎和天使呼吸跃变高峰的出现都比类似乙烯跃变高峰的出现提前１～２天。说明月季切花乙烯生成量与呼吸强度的变化动态有很大不同 相似文献
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黄河蜜甜瓜采后呼吸强度及乙烯释放量的变化 总被引：1，自引：0，他引：1
黄河蜜甜瓜采后具有典型的呼吸跃变与乙烯释放高峰，果腔中ＣＯ２及乙烯浓度随采后时间的延长而增加。不同部位组织呼吸与乙烯释放量跃变高峰以果顶处出现较早，中部次之，柄部较迟。果实中部的呼吸强度及乙烯释放量明显高于其它部位 相似文献
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钙在乙烯促进网纹甜瓜果实软化过程中的作用 总被引：2，自引：0，他引：2
以网纹甜瓜为试材, 通过测定果实硬度、呼吸速率、乙烯释放量、1-氨基环丙烷基羧酸(ACC) 含量及ACC合成酶(ACS) 和ACC氧化酶(ACO) 的活性, 研究钙在乙烯促进网纹甜瓜果实软化过程中的调控作用。结果表明: 采用浓度为015%外源硝酸钙处理1 h和10μL·L-1外源乙烯处理24 h, 乙烯处理可提高网纹甜瓜果实中水溶性钙含量, 降低果胶酸钙的含量, 提高果实的呼吸速率, 缩短呼吸跃变高峰出现的时间, 并通过提高ACC含量以及ACS和ACO活性, 提高了乙烯释放量; 先乙烯处理后增施钙可进一步提高水溶性钙含量并降低果胶酸钙的含量和提高呼吸速率、ACC含量、ACS和ACO活性以及乙烯释放量。但单施钙可明显提高果实中果胶酸钙的含量, 推迟降低了呼吸速率, 推迟ACC含量、ACS和ACO活性峰值出现的时间及峰度值, 从而降低了果实的乙烯释放量; 而与单用钙处理相比, 先钙后乙烯处理在一定程度上提高了呼吸速率、ACO活性和乙烯释放量, 但是以上各指标仍低于对照。由此可见, 钙虽然具有延缓网纹甜瓜果实软化的作用, 但可促进乙烯诱导条件下网纹甜瓜果实的软化。 相似文献
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亚精胺对柿果采后乙烯生物合成的影响 总被引：15，自引：0，他引：15
研究了为柿采后乙烯生物合成以及不同浓度外源亚精胺（Ｓpd）处理对其乙烯代谢的影响。结果表明：火柿果实属呼吸跃变型;较高浓度（１０．０mmol/Ｌ）外源spd处理抑制乙烯释放和硬度下降;较低浓度（１．０、０．１mmol/Ｌ）促进乙烯释放和硬度下降,这种效应可以被乙烯生物合成抑制剂所逆转。 相似文献
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茄子果实冷害生理的研究 总被引：8，自引：0，他引：8
‘杭州红茄’果实在（２±１）℃低温下贮藏６ｄ即出现冷害症状。冷害发生前乙烯释放量较高,而后急剧降至较低水平;ＳＯＤ活性在此温度下前８ｄ一直呈上升趋势,但显著低于（１３±１）℃条件下的活性;ＣＡＴ活性在４ｄ后即迅速降至较低水平;膜透性和ＰＯＤ活性则在冷害发生（第６天）后急剧上升。表明果实冷害的发生是冷害低温抑制ＳＯＤ和ＣＡＴ活性、强化膜脂过氧化作用的结果,而ＰＯＤ活性的上升则促进了冷害的发展。 相似文献
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乙烯对成熟期新红星苹果果实碳水化合物代谢的调控 总被引：56，自引：5，他引：51
以‘新红星’苹果为试材,研究了果实成熟期（花后１２０ｄ）喷布乙烯利和ＡＯＡ（氨基羟基乙酸）对果实碳水化合物代谢及相关酶活性的影响。结果表明,在果实成熟过程中,随着淀粉含量下降,可溶糖（主要为蔗糖）含量增加。乙烯利处理在显著加速淀粉降解的同时显著增加蔗糖含量,而对果糖和葡萄糖含量无显著影响。乙烯利处理后,淀粉酶和蔗糖合酶的活性增强,在果实成熟过程中活性变化较小的中性转化酶活性下降的状况。ＡＯＡ处理使 相似文献
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A. A. Saquet 《The Journal of Horticultural Science and Biotechnology》2013,88(5):910-914
SummaryThe aim of this work was to investigate the fermentative metabolism of ‘Conference’ pears during different storage regimes. Fruits were stored at 0°C in the following controlled atmosphere (CA) conditions: 6 kPa CO2 + 0.5 kPa O2;3 kPa CO2 + 1 kPa O2; or 1 kPa CO2 + 2 kPa O2; and also in regular air (RA) as a control. Pears kept in RA showed low pyruvate decarboxylase (PDC) and alcohol dehydrogensase (ADH) activities, and correspondingly low levels of ethanol and acetaldehyde production as long as the fruits were maintained at low temperatures. During shelf-life at 20°C, RA-fruits released higher amounts of acetaldehyde, while ethanol production remained low. Lactate concentrations in RA-stored pears increased continuously in the second part of the storage period and during shelf-life, while lactate dehydrogenase (LDH) activity remained low. During CA-storage, ‘Conference’ pears showed continuous increases in the activities of PDC and ADH, mainly in fruits stored under high CO2 and/or low O2 partial pressures. The production of ethanol and acetaldehyde was not influenced in fruits stored in 6 kPa CO2 + 0.5 kPa O2. LDH activity in CA-stored pears increased during storage, while lactate concentrations diminished. During shelf-life at 20°C, the concentrations of all measured fermentation products increased, particularly acetaldehyde and lactate. We conclude that PDC, ADH, and LDH activities are not rate-limiting factors in the accumulation of fermentation products in ‘Conference’ pears during storage and shelf-life at 20°C. 相似文献
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ABA和乙烯与甜樱桃果实成熟的关系 总被引：11，自引：1，他引：10
以‘红灯’甜樱桃为试材,分析了果实生长发育过程中内源脱落酸(ABA)和1-氨基环丙烷-1-羧酸(ACC)含量的变化以及外源ABA和乙烯利处理对果实成熟进程的影响,探讨了ABA和乙烯与甜樱桃果实成熟的关系。结果表明:果皮和果柄中的ABA含量呈逐渐上升的趋势,在花后43d达到最大值。果肉中的ABA含量呈先下降后上升再下降的趋势,在花后14d时含量较高,之后下降,花后25d开始又迅速上升,至花后36d出现一高峰,之后下降。种子中的ABA含量和果肉表现出相似的变化趋势,但ABA峰值的出现早于果肉。ACC含量在果实的整个发育过程中变化不大,并且一直处于很低的水平,最大值不足0.02nmol·g-1FW。外源ABA能促进内源ABA的合成和乙烯的释放,但对内源ACC的变化没有显著影响。乙烯利持续处理能促进乙烯的释放,提高内源ACC的水平。外源ABA能提高甜樱桃果实的成熟度和花青苷含量,促进果实软化。乙烯利处理对果实的硬度、花青苷含量和成熟度指数均没有显著影响。 相似文献
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Ssatoru Kondo Skoichi Inoue Stakaaki Manabe 《The Journal of Horticultural Science and Biotechnology》2013,88(5):614-617
SummaryThe effect of 2,4-dichlorophenoxy-propionic acid (2,4-DP) on fruit ripening on the tree was investigated in `La France' pears (Pyrus communis L.). Forty-five ppm, 2,4-DP solution was applied at 159 d after full bloom (DAFB), which was optimum harvest date for `La France' pears. They were compared with fruit harvested at 159 DAFB and placed in a controlled room with a 208C and 90% r.h. After harvest, the fruit firmness decreased dramatically 13 d after harvest (DAH). In 2,4±DP treatment, the levels decreased gradually 13 d after treatment (172 DAFB). In the untreated control, the levels also showed a slight decrease with time. Final ethylene concentration was almost the same in harvested and 2,4-DP treated fruit, but lower in the untreated control. In each treatment, water-soluble polyuronide (WSP) concentrations increased with time and hexametaphosphate-soluble polyuronide (HMP) and HCl-soluble polyuronide (HP) concentrations decreased. WSP concentration increased rapidly 20 DAH in harvested fruit and 194 DAFB in 2,4-DP treatment. Harvested and 2,4-DP treated fruit reached the edible condition on 17 DAH and 194 DAFB, respectively. Pectinesterase (PE) activity increased slightly with time for all treatments, showing no significant difference between treatments. Polygalacturonase (PG) activity increased gradually in all cases, being higher in 2,4-DP treated fruit than in control fruit left on the tree. These results suggest that 2,4-DP treatment before harvest induces pear fruit softening. This implies that 2,4-DP may be used as a replacement for low-temperature storage to promote the ripening, and good quality ripe fruit with buttery and juicy texture may be harvested on the tree. 相似文献
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Satoru Kondo Tomohiro Osumi Suktawee Sirinan Shanshan Wang Takanori Saito Katsuya Okawa 《The Journal of Horticultural Science and Biotechnology》2019,94(2):201-209
The effects of two oxylipins – jasmonic acid (JA) and 9, 10-ketol-octadecadienoic acid (KODA) – on ethylene metabolism and ethylene receptor genes were examined in peach fruit (Prunus persica L.) harvested at 88 days after full bloom (DAFB), in the pre-climacteric stage, and at 102 DAFB, at the beginning of the climacteric stage. Immediate post-harvest applications of either n-propyl dihydrojasmonate (PDJ) (a JA analog) or KODA stimulated ethylene production and 1-aminocyclopropane-1-carboxylate (ACC) concentrations in fruit that were harvested at 88 and 102 DAFB. KODA application significantly increased levels of ACC oxidase (PpACO1) expression at 5 and 8 days after treatment (DAT) in 88-DAFB-harvested fruit, and at 1 DAT in 102-DAFB-harvested fruit. Expression levels of ethylene response factors (PpERS1) were not influenced by either PDJ or KODA applications at 88 or 102 DAFB. In contrast, levels of ethylene-receptor-coding genes (PpETR1) expression in 88-DAFB KODA-treated fruit increased at 8 and 14 DAT. Expression levels of constitutive triple response (PpCTR1) in the untreated control fruit decreased with DAT in both 88- and 102-DAFB-harvested fruit.
These results suggest that certain oxylipins may promote ethylene production in peach fruit, and that PpETR1 and PpCTR1 may be associated with the autocatalytic system of ethylene production. 相似文献
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钙对“新红星”苹果乙烯生成的作用 总被引：14，自引：1，他引：13
本研究采用减压渗钙的方法处理‘新红星’苹果,结果表明,钙处理降低了果实乙烯含量,并降低果实ACC含量与EFE活性,但增大果实MACC含量,还影响了果实蛋氨酸含量。 相似文献
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高氧处理对蓝莓和草莓果实采后呼吸速率和乙烯释放速率的影响 总被引：12，自引：0，他引：12
研究了40%、60%、80%和100% O2 及空气气流连续处理对‘Duke’蓝莓和‘Allstar’草莓果实在5℃下35 d和14 d贮藏期间呼吸作用和乙烯产生的影响。结果表明, 60% ～100% O2 处理显著抑制蓝莓果实的呼吸速率和乙烯释放速率, 并且O2 浓度越高, 呼吸速率和乙烯释放速率越低, 而40% O2 对蓝莓果实呼吸速率和乙烯释放速率无显著影响。在贮藏前8 d, 高氧处理对草莓果实呼吸速率和乙烯释放速率无显著影响, 但在贮藏10～14 d, 80%和100% O2处理的呼吸速率和乙烯释放速率显著低于对照和其它高氧处理。 相似文献
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为进一步了解扩展蛋白（Expansin,EXP）在柿果实采后软化过程中的作用,以丙烯和1–甲基环丙烯（1-methylcyclopropene,1-MCP）处理‘富平尖柿’采后果实,采用实时荧光定量PCR技术检测果实中EXP基因表达量的变化。结果显示,丙烯促进柿果实成熟软化,使乙烯释放高峰升高并提前到来,提高ACC合成酶（ACS）、ACC氧化酶（ACO）活性;1-MCP减缓柿果实的成熟软化,推迟并降低乙烯释放高峰,抑制ACS和ACO活性。随着贮藏时间的延长,柿果实逐渐软化,对照果实DkEXP3和DkEXP4的相对表达量均表现为先上升后下降的趋势。丙烯处理促进了DkEXP3和DkEXP4的表达,使表达高峰升高且提早到来;1-MCP处理抑制了DkEXP3和DkEXP4的表达,推迟且降低了表达高峰。对照和1-MCP处理的果实的DkEXP3和DkEXP4的相对表达量高峰均较乙烯释放高峰早。DkEXP3和DkEXP4在果皮、果肉、果心中表达水平不同。本结果说明EXP可能在采后柿果实成熟软化前期起作用,其表达有组织特异性,且受到乙烯的调控。 相似文献