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本试验主要研究光质对蔬菜生育及品质的影响。结果表明。橙色膜栽培番茄和不结球白菜、中黄色膜栽培不结球白菜均有明显抑制生殖生长的作用。浅琥珀色膜和中黄色膜栽培四季萝卜也有较明显的抑制生殖生长的作用。黄色膜能促进番茄现蕾,加快生殖生长。含蓝光成分较少的中黄色膜既有利于不结球白菜和四季萝卜肉质根中葡萄糖、维生素C含量的增加,又能降低致癌物质亚硝酸盐的含量。 相似文献
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研究了海藻酸钠涂膜对金冠苹果果肉硬度、呼吸强度、乙烯释放与膜脂过氧化的影响。结果表明:海藻酸钠涂膜可保持果肉硬度,降低果实呼吸强度和乙稀释放速率,减弱膜脂过氧化作用,保持细胞膜的完整性,从而延缓果实衰老。 相似文献
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海藻酸钠涂膜对苹果生理变化的影响 总被引:8,自引:0,他引:8
研究了海藻酸钠涂膜对金冠苹果果肉硬度、乙烯释放与膜脂过氧化的影响。结果表明:海藻酸钠涂膜可保持果肉硬度,降低果实呼吸强工和乙烯释放速率,弱膜脂过氧化作用,保持细胞的完整性。从而延缓果实衰老。 相似文献
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为了缓解水资源紧缺现状,研究果蔬类科学灌溉,全面提升水资源的利用率和水分生产效率.以“朝研229”番茄为试材,研究比较了M畦膜下沟灌溉、膜上灌溉和传统的畦灌对番茄水分生产效率的影响.结果表明:各处理番茄的株高、茎粗、叶面积,随生育期呈增加趋势,M畦膜下和膜上灌溉处理单果质量与小区产量、667 m2产量无显著差异,但与传统灌溉差异显著,M畦膜下沟灌溉、膜上灌溉比传统灌溉分别节水175.0、200.0 m3/667m2.设施果类蔬菜灌溉采用M畦膜下沟灌具有节水、节肥、增产、省时省工,提高水分生产的作用. 相似文献
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自由基清除剂对香蕉水分胁迫的保护作用 总被引:2,自引:0,他引:2
本文用苯皿酸钠、a-生育酚和V 作为外源自由基清除剂,研究其对香蕉的抗旱保护作用结果表明,外源自由基清除剂预处理降低了干旱条件下香蕉叶片细胞的膜生和膜脂过氧化程度,延缓叶绿素、可溶性蛋白南含量的降低,表现出外源自由基保护剂对减轻干旱引起的自由基伤害,提高香蕉抗旱能力具保护作用。不同清除剂的保护效果存在差异,以a-生育酚效果最好。 相似文献
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套袋对厚皮甜瓜品质的影响 总被引:4,自引:0,他引:4
利用7种颜色的塑料薄膜袋和2种白色纸袋,研究了套袋对厚皮甜瓜鲁厚甜2号品质的影响。结果表明:套袋显著改善了厚皮甜瓜的外观品质,提高了单果质量和果肉硬度;除黑膜袋处理外,其他套袋处理均不同程度地提高了厚皮甜瓜果实VC含量,大多数套袋处理(除蓝膜袋处理外)均可提高厚皮甜瓜果实中果糖、蔗糖、可溶性糖和总糖含量;套袋对厚皮甜瓜可溶性蛋白含量有降低作用,对可溶性固形物含量的影响不大;白膜袋、红膜袋和硫酸纸袋处理对改善厚皮甜瓜的风味效果最好。 相似文献
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多胺引发处理对茄子种子活力及幼苗耐冷性的影响 总被引:4,自引:2,他引:2
以‘丰研2号’茄子种子为试材,分别用0.25mmol·L-1的亚精胺(Spd)和精胺(Spm)引发处理24h后,分别在10、15、25℃条件下进行种子发芽试验,并测定幼苗耐冷性等生理生化指标。结果显示,Spd和Spm处理可显著提高种子在低温胁迫条件下的活力,促进幼苗生长,显著降低了低温胁迫条件下幼苗细胞质膜透性和MDA含量,提高了抗氧化酶(SOD、POD、CAT)活性和脯氨酸、可溶性蛋白质的含量,表明多胺引发处理对提高低温胁迫下茄子种子活力及增强幼苗耐冷性具有重要作用。 相似文献
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钙调素拮抗剂与Ca2+对茄子幼苗抗冷性的影响 总被引:25,自引:0,他引:25
研究钙调素(CaM) 拮抗剂W7〔N- (6-aminohexyl)-5-chloro-1-naphthalene sulfonamide〕和Ca2+对茄子幼苗抗冷性的影响, 结果表明: W7 浸种处理显著提高了低温胁迫下茄子幼苗叶片电解质渗透率和MDA 含量, 降低了SOD、CAT活性和可溶性蛋白质含量; 而Ca2+浸种处理显著降低了低温胁迫下叶片电解质渗透率和MDA 含量, 提高了SOD、CAT活性和可溶性蛋白质含量, 说明Ca2+-CaM信使系统在茄子幼苗抗冷调控过程中起着重要的作用。 相似文献
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5-氨基乙酰丙酸对弱光下甜瓜幼苗光合作用和抗冷性的促进效应 总被引:37,自引:3,他引:37
5-氨基乙酰丙酸(ALA)10 mg·L 处理能够明显提高弱光下生长的甜瓜幼苗叶片净光合速率(Pn),而低温胁迫明显降低甜瓜幼苗叶片光合能力。经ALA处理过的甜瓜幼苗光合表观量子效率、羧化效率、气孔开度、叶片叶绿素(特别是叶绿素b)和可溶性糖含量均显著增加。在ALA处理3 d之后将幼苗转移到8℃低温条件下4 h,对照叶片光合能力基本丧失,而ALA处理叶片仍能维持一定的光合能力,并在20 h内基本恢复至对照水平。若幼苗在低温下处理6 h,对照植株完全死亡,而ALA预处理植株仅出现少量伤害症状。本研究结果表明,ALA处理可以提高植物耐弱光性和抗冷性。 相似文献
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J. Amos R. G. Hatton T. N. Hoblyn R. C. Knight 《The Journal of Horticultural Science and Biotechnology》2013,88(3):248-258
SummaryThe effects of seed coat removal and chilling on the germination of seeds of ten cultivars of ornamental peach (Prunus persica Batsch) were investigated. Seeds were rinsed in running tap water for 48 h in order to facilitate seed coat removal. Only a few non-chilled, intact seeds germinated (e.g., 6% of ‘Hito’ seeds). Seed coat removal and no chilling resulted in some seed germination in eight of the ten cultivars, ranging from 6% to 83%. Chilling intact seeds at 5°C for up to 10 weeks resulted in greater frequencies of germination (average = 85% germination) than seed coat removal before (average = 80%) or after chilling (average = 73%). There was a linear decrease in the germination percentage with an increase in abscisic acid (ABA) content for ‘Yaguchi’,‘Kanpaku’, and ‘Kikumomo’ seeds (R = –0.66; P <0.001). The most consistent decrease in total seed ABA content (average of 64%) occurred during the 48 h rinsing period. In ‘Kanpaku’, dry seeds had an intermediate ABA content (13 ng per seed); but, in the embryonic axes, this increased from 0.03 ng to 1.2 ng per seed with an increase in the duration of the chilling period. The lowest germination percentages were found in this cultivar. These results suggest that ABA synthesis in the embryonic axes during chilling may affect the varietal characteristic of seed dormancy, and that rinsing seeds for >48 h could remove sufficient ABA to allow seed germination with minimum chilling. 相似文献
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Albert C. Purvis 《Scientia Horticulturae》1984,23(3):261-267
Differences in chilling injury susceptibility of grapefruit from exterior and interior tree canopy positions were used to investigate the hypothesis that water loss is related to chilling injury symptom development during low-temperature storage. The sun-exposed surface of grapefruit from exterior canopy positions was more susceptible to chilling injury and had lower diffusive resistance than the shaded surface of the same fruit. Reducing the rate of fruit transpiration during the first week of storage by a pre-cooling treatment prior to low-temperature storage delayed, but did not eliminate, the development of chilling injury. 相似文献
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研究了0.25、0.50、1.00 μL · L-1 浓度的1–甲基环丙烯(1-MCP)对4 ℃冷藏条件下‘阳丰’甜柿果实成熟生理和冷害发生的影响。结果表明:1-MCP处理推迟了冷害症状的出现,降低了果实细胞膜透性和丙二醛(MDA)含量;延缓了乙烯释放高峰出现的时间并降低了峰值;对呼吸速率没有明显影响;提高了超氧化物歧化酶(SOD)和过氧化氢酶(CAT)活性;对多酚氧化酶(PPO)和过氧化物酶(POD)活性变化有一定的抑制作用。1.00 μL · L-1 1-MCP对冷害的控制作用比其他两个浓度更显著。 相似文献
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Paclobutrazol (PBZ) is a member of the triazole plant-growth inhibitor group that is responsible for inducing tolerance to number of biotic and abiotic stresses. An experiment was, therefore, conducted to test whether PBZ application at various concentrations (0, 25, 50 and 75 mg L−1) through seed soaking or foliar spray would protect watermelon (Citrullus lanatus) seedlings, subjected to chilling stress. Thirty-five-day old plants were exposed to chilling 5 h/day at 4 °C for 5 days. PBZ improved growth rate of watermelon seedling subjected to chilling stress and increased relative leaf chlorophyll content (RLCC) and chlorophyll fluorescence ratio (Fv/Fm) compared with the control at the end of chilling stress. PBZ ameliorated the injury caused by chilling stress by inhibiting increases in proline and leaf electrolyte leakage, which suggested that PBZ ameliorated the negative effect of chilling stress. PBZ was most effective in increased chilling tolerance of watermelon seedling when applied using the seed soak method than as a foliar spray. The best protection appeared to be obtained from seedlings seed soaked with PBZ at 50 and 75 mg L−1. 相似文献