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Managing the postharvest physiology of unrooted cuttings to enhance shipping and postharvest quality.

机译:管理无根插条的采后生理,以提高运输和采后质量。

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摘要

United States ornamental plant producers imported approximately ;Modified atmosphere storage of impatiens, geranium and poinsettia cuttings showed that cuttings held in 1%:20% oxygen:carbon dioxide generated higher ethylene concentrations than any other treatment including atmospheric control. Cuttings stored in 10:10, 10:5, 5:10, 5:5 generated less ethylene compared to atmospheric control. Cuttings stored in 10:5 performed best during propagation, with less leaf yellowing than other treatments. Application of 700 muL · L-1 1-MCP prevented ethylene damage to begonia, portulaca and lantana. 700 ·muL · L-1 1-MCP application to poinsettia, impatiens, zonal geranium ivy geranium, and petunia cuttings caused significant ethylene biosynthesis. 1-MCP application reduced zonal geranium root numbers and delayed adventitious root formation of angelonia, calibrachoa, impatiens, portulaca, sutera and verbena, though 1-MCP rooting effects were overcome by subsequent immediate exposure to ethylene. Ethylene evolution from cuttings harvested from ethephon treated stock plants is suspected to cause leaf abscission of unrooted cuttings during shipping. Impatiens cuttings harvested 24 hours after treatment with 0,250,500 or 1000 mg L-1 ethephon produced 0.07, 1.3, 1.7 or 5.8 mg· L-1 · g-1 ethylene in the first 24 hours of storage at 20°C, respectively. Cuttings harvested 24 hours after treatment with 500 mg· L-1 ethephon stored at 10, 15, 20, and 25°C for 24 hours produced 0.37, 0.81, 2.03 and 3.55 mg · L-1 g -1 ethylene. Ethephon treatment effects were measurable on harvested cuttings up to 3 weeks post application.
机译:美国观赏植物生产商大约进口了;凤仙花,天竺葵和一品红插条的改良大气存储表明,在1%:20%的氧气:二氧化碳中,插条产生的乙烯浓度比其他任何处理方法(包括大气控制)更高。与大气控制相比,以10:10、10:5、5:10、5:5储存的碎屑产生的乙烯更少。以10:5储存的插条在繁殖过程中表现最佳,与其他处理相比,叶片发黄少。 700μL·L-1 1-MCP的施用可防止乙烯对秋海棠,马齿ca和马tana丹的损害。 700•μL·L-1 1-MCP应用于一品红,凤仙花,带状天竺葵,常春藤天竺葵和矮牵牛插枝引起大量的乙烯生物合成。 1-MCP的施用减少了天竺葵的根系根数,并延缓了当归,calibrachoa,凤仙花,马齿ula,子宫和马鞭草的不定根形成,尽管随后立即暴露于乙烯也克服了1-MCP的生根作用。从乙烯利处理过的砧木中收获的插条中产生的乙烯释放被怀疑会导致运输过程中叶片无根插条的脱落。用0,250,500或1000 mg L-1乙烯利处理24小时后收获的凤仙花插条在20°C下储存的前24小时分别产生0.07、1.3、1.7或5.8 mg·L-1·g-1乙烯。用500 mg·L-1乙烯利处理10、15、20和25℃24小时后收获的插条产生0.37、0.81、2.03和3.55 mg·L-1 g -1乙烯。施用后最多3周,乙烯利对收获的插条的效果可测。

著录项

  • 作者单位

    North Carolina State University.;

  • 授予单位 North Carolina State University.;
  • 学科 Agriculture Horticulture.
  • 学位 Ph.D.
  • 年度 2008
  • 页码 119 p.
  • 总页数 119
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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