共查询到18条相似文献，搜索用时 859 毫秒
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以‘玉金香’甜瓜果实(Cucumis melon L.var Yujinxiang)为试材,研究了1-MCP(1-甲基环丙烯)处理对低温贮藏期间甜瓜果实内源植物激素乙烯、脱落酸(ABA)、生长素(IAA)、赤霉素(GA3)和玉米素核苷(ZR)的影响。采用1μL/L1-MCP,在温度为(21±1)℃的条件下处理甜瓜果实24h之后转入(10±1)℃,70%～80%RH环境中贮藏。结果表明:经1μL/L1-MCP处理果实24h可显著抑制甜瓜果实贮藏期间乙烯释放量、延缓乙烯高峰的出现;显著抑制甜瓜果实贮藏期间ABA含量的增加,将ABA含量的峰值推迟8d;提高了果实ZR和GA3的含量;延缓了果实IAA含量的升高。由这些结果推断,1-MCP处理对甜瓜低温贮藏后品质的保持的效果可能与其降低果实内源乙烯,ABA含量,提高GA3、ZR的含量,延缓果实的衰老有关。 相似文献
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以"金红"苹果果实为试材,采用1.0μL·L~(-1)浓度的1-甲基环丙烯(1-MCP)处理果实,研究了常温(20±1)℃条件下,1-MCP处理对"金红"苹果果实采后生理和贮藏品质的影响。结果表明:与对照(CK,1-MCP处理浓度为0)相比,1.0μL·L~(-1) 1-MCP处理可有效抑制"金红"苹果常温贮藏期间果实呼吸强度和乙烯释放量,推迟或抑制果实呼吸高峰和乙烯释放高峰的出现,显著(P≤0.05)降低果实的乙醇和乙醛含量,减轻细胞膜的透性,降低果实腐烂率。并且1-MCP能有效抑制果皮返糖发亮和底色转黄,保持果皮红黄鲜艳度,明显抑制果实硬度、维生素C和可滴定酸含量的下降,较好维持贮藏中后期果实的SSC。采用1-MCP处理可以将"金红"苹果常温贮藏期从9～12 d延长到30 d,仍能保持较好的外观和内在品质。 相似文献
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以1-甲基环丙烯(1-MCP)处理并低温贮藏120 d的‘徐香’猕猴桃为试材,采用200 mg·L^-1外源乙烯分别熏蒸5 h和10 h,测定和分析果实在10 d常温货架(20℃)期间的品质指标变化,以期为猕猴桃商品化处理技术提供参考依据。结果表明:与不经乙烯处理的果实相比,外源乙烯熏蒸提高了1-MCP处理猕猴桃的呼吸速率和乙烯释放速率,保持了较高的可溶性糖含量和果肉色泽a^*值,加快了果肉、果心硬度以及可滴定酸含量的下降,明显提高了果实在货架期的感官品质,其中乙烯熏蒸10 h的效果较好。外源乙烯熏蒸可以促进1-MCP处理猕猴桃在货架期的正常后熟,降低1-MCP对果实食用品质的不利影响。 相似文献
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果肉软化和褐变是李果实长期冷藏时的主要问题。以‘安哥诺’李为材料,采用1-MCP(0.5μL.L-1)、薄膜(30μm厚)包装(MAP)及包装内加入乙烯吸收剂(EA)的方法,研究了0℃冷藏期间‘安哥诺’李品质、褐变及其生理生化的变化。结果表明,与对照(未进行处理)相比,1-MCP、MAP和MAP+EA及其组合处理延缓了果肉软化,抑制可溶性固形物(SSC)和花青苷含量上升,保持果肉较高的白度指数,降低果肉褐变度、酚含量和多酚氧化酶(PPO)活性,1-MCP+MAP+EA的复合处理效果最佳。这些说明,采后进行1-MCP、MAP和EA的复合处理能有效抑制果肉软化和褐变,改善了果实贮藏品质。 相似文献
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1-MCP二次处理对猕猴桃果实采后生理生化及贮藏效果的影响 总被引：14，自引：1，他引：14
为进一步提高1-MCP在果实贮藏保鲜上的应用价值,以金魁美味猕猴桃果实为试材,对采后果实经1-MCP一次处理和二次处理后对果实生理生化和贮藏寿命的影响进行了比较。结果表明,1-MCP处理显著地降低了果实的硬度、维生素C含量的下降速率,强烈地抑制了乙烯的生成速率和呼吸速率,延缓了果实淀粉酶、氯霉素乙酰转移酶(CAT)、超氧化物歧化酶(SOD)活性高峰的到来,且1-MCP重复处理的效果更为突出,它极其有效地在一次处理的基础上进一步延长了果实的贮藏寿命,很好地保持了果实品质。 相似文献
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以"早金酥"梨为试材,经不同浓度(0.0(CK)、1.0、2.0、4.0μL·L~(-1))1-MCP处理后,放置在(0±0.5)℃条件下贮藏105d,研究其品质变化。结果表明:不同浓度1-MCP处理均显著抑制了果实乙烯的合成,降低了果实呼吸强度,较好地保持了果实中可滴定酸含量和维生素C含量,维持了果实硬度,提高了果实的品质,但对果实可溶性固形物含量的变化无明显的影响。1-MCP处理对"早金酥"梨贮藏保鲜效果显著,以2.0μL·L~(-1)的1-MCP处理效果最好。 相似文献
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以宁夏中部干旱带生产的‘玉金香’甜瓜为试材,采用0、0.5、1μL/L的1-MCP,研究不同浓度1-MCP处理对甜瓜果实贮藏期间品质、生理代谢的影响,以期筛选最适宜的1-MCP处理浓度.结果表明:1-MCP处理可以显著延缓贮藏期间甜瓜果实硬度的下降,以1 μL/L 1-MCP处理的效果最好,延长果实的贮藏期;延缓了甜瓜贮藏期可溶性固形物含量下降的趋势,一定程度上保持了甜瓜贮藏期的风味;抑制甜瓜果实贮藏期间呼吸强度、延缓呼吸高峰的出现;显著抑制了贮藏期果实乙烯的释放量,并推迟了乙烯高峰出现的时间.说明1-MCP是通过抑制甜瓜贮藏期乙烯的释放量达到抑制乙烯的生理效应. 相似文献
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W. Krongyut E. B. Esguerra J. S. Maninang S. Sugaya H. Gemma 《The Journal of Horticultural Science and Biotechnology》2013,88(6):631-639
SUMMARY‘Sunrise’ papaya fruit harvested at two stages of maturity [colour break (< 10% yellow peel colour) and 25% yellow peel colour] were treated with 100 nl l–1 1-methylcyclopropene (1-MCP) to determine its effects on ripening, on the activities and levels of gene expression of polygalacturonase (PG), pectin methyl esterase (PME), and βgalactosidase ( βGal), and on the degradation of cell wall components. 1-MCP delayed ripening and the onset of the climacteric, although the peak in the respiration rate was almost the same as that in untreated control fruit. Colour-break fruit treated with 1-MCP exhibited a continuous increase in ethylene production, but at a lower rate than in control fruit. Consequently, 1-MCP-treated fruit ripened with a concomitant reduction in firmness, which was accompanied by an increase in PG and βGal enzyme activities and gene expression. On the other hand, fruit treated with 1-MCP at the 25% yellow stage exhibited lower levels of ethylene production and developed pulp with a rubbery texture at the ripe stage which was attributed to reduced PG, βGal, and PME enzyme activities and gene expression. This was consistent with the higher level of cell wall polysaccharides measured in 1-MCP-treated fruit. The above results indicated that ‘Sunrise’ papaya fruit can be treated with 1-MCP at the colour break stage since they have a greater capacity to recover from the effects of 1-MCP than fruit treated at the 25% yellow stage. 相似文献
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采用cDNA-AFLP技术分离了一个与番木瓜果实成熟衰老相关的差异片段,经生物信息学分析证实该片段属于半胱氨酸蛋白酶（Cysteine Protease,CP）基因。将差异片段序列在NCBI中的番木瓜基因组序列中搜索,获得了半胱氨酸蛋白酶基因DNA序列。设计开放型阅读框上、下游引物,以木瓜果肉RNA逆转录的cDNA为模板扩增该基因全长cDNA序列,命名为CpCP（登录号：JN689334）。该基因属于C1肽酶家族中的C1A亚家族,编码471个氨基酸,含有家族特有的催化三联体：Cys166-His302-Asn322。Real-time PCR结果显示CpCP在果实中大量表达,是根、茎、叶、花中表达量的几十倍;CpCP受乙烯处理诱导,受1-MCP处理抑制,表达模式与番木瓜果实成熟衰老进程一致,说明CpCP参与了番木瓜果实成熟衰老进程。 相似文献
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E. Giraldo M.J. Szczerbanik K.J. Scottpez J.E. Paton D.J. Best 《The Journal of Horticultural Science and Biotechnology》2013,88(2):162-166
SummaryStorage of the ‘Nijisseiki’ cultivar of Japanese pears was studied over three seasons for periods up to 36 weeks at 0°C. Storage in 50 μm thick low-density polyethylene (LDPE) bags at 0°C considerably delayed yellowing in all experiments, even after fruit was removed to 20°C for 1 week at the end of storage. The addition of an ethylene absorbent made from potassium permanganate on aluminium oxide (Purafil II) further delayed yellowing. Carbon dioxide levels in both treatments varied, but were generally in the range 2–3%. Oxygen levels remained high, generally 16–19%. In bags without Purafil, ethylene levels rose slightly during storage and were generally about 0.15 μl l–1. When Purafil was included in the bags, the ethylene level was reduced 10-fold or more. A sensory test indicated that the use of LDPE bags and ethylene absorbent resulted in fruit with better eating quality than fruit stored in air. Disorders over the 3-year investigation were low even after long-term storage. The use of polyethylene bags reduced the severity of flesh browning, and flesh spot decay was virtually absent. The use of bags increased the severity of core browning. Inclusion of an ethylene absorbent in bags reduced the severity of disorders, particularly core browning. Treatment of the fruit with 1-methylcyclopropene (1-MCP), before or during storage, resulted in higher ethylene levels in the polyethylene bags. At the concentrations used, 1-MCP did not improve the storage of ‘Nijisseiki’ compared to the use of polyethylene bags with Purafil II. 相似文献
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以樱桃番茄(Lycopersicon esculentum ) 品种‘卡罗’果实为材料, 研究了1-MCP处理对不同成熟度果实采后20℃贮藏过程中乙烯受体Le2ETR4表达和乙烯释放水平的影响。结果表明: 1-MCP处理可以抑制跃变上升期(破色期) 番茄果实乙烯释放及Le2ETR4表达; 对跃变前期(绿熟) 和跃变高峰期(粉红期) 果实Le2ETR4表达也有抑制作用, 但对乙烯释放无明显影响; 对跃变下降期(红熟期) 果实Le2ETR4表达不仅无明显影响, 反而促进了乙烯释放。 相似文献
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SummaryHarvested mei (Prunus mume) fruit were stored at 20°C after exposure to 500 nl l–1 1-methylcyclopropene (1-MCP) for 8 h. Firmness, peel colour, chlorophyll content, chlorophyllase activity, soluble solids content (SSC), titratable acidity (TA), respiration and ethylene production, and cell wall hydrolysis enzyme activities were monitored to determine the efficacy of 1-MCP treatment in delaying mei fruit ripening compared to untreated control fruit. Results showed that control ‘daqinghe’ mei fruit displayed typical climacteric patterns of respiration and ethylene production. Peak CO2 production and ethylene production were observed after 6 d. Fruit softening was accompanied by a progressive decrease in colour parameters expressed as hue angle (h°), chlorophyll content, SSC, TA and increases in chlorophyllase, pectin methylesterase (PME) and polygalacturonase (PG) activities. 1-MCP treatment prior to the climacteric increase significantly delayed the onset of the climacteric peaks of CO2 and ethylene production. These delays were associated with reductions in fruit softening, consistent with delaying the activities of PME and PG. Fruit treated with 1-MCP exhibited less peel colour change from green-to-yellow because of their lower levels of chlorophyllase activity and less chlorophyll breakdown. Moreover, 1-MCP treatment also significantly retarded reductions in SSC and TA compared with control fruit. The shelf-life of mei fruit ripening was increased by 4 d following 1-MCP treatment. Thus, 1-MCP treatment can markedly extend the post-harvest life of ‘daqinghe’ mei fruit. 相似文献