Tuber Water and Pressure Potentials Decrease and Sucrose Contents Increase in Response to Moderate Drought and Heat Stress
Tuber Water and Pressure Potentials Decrease and Sucrose Contents Increase in Response to Moderate Drought and Heat Stress
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DOI：
10.1007/s12230-009-9109-8
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发表时间：
2009-11-01
影响因子：
1.5
通讯作者：
Bussan, Alvin J.
中科院分区：
文献类型：
--
作者：
Bethke, Paul C.;Sabba, Robert;Bussan, Alvin J.
生长季节的环境胁迫会降低马铃薯块茎的贮藏品质。研究了在中度干旱、高温或干旱和高温胁迫条件下，温室红松块茎水势和块茎成分的变化。胁迫处理结束时，叶片和块茎水势下降。块茎水势降低导致块茎压力势急剧下降。块茎蔗糖含量随胁迫程度的加重而增加。还观察了块茎葡萄糖和苹果酸含量的变化。块茎膨大早期的胁迫对胁迫结束时块茎糖分的影响大于膨大后期的胁迫。在葡萄衰老后收获时，块茎的茎端葡萄糖浓度在块茎膨大早期的植株中高于块茎膨大后期的植株。
Environmental stress during the growing season can reduce the quality of stored Solanum tuberosum (potato) tubers. Changes in greenhouse grown Russet Burbank tuber water potential and tuber composition following periods of moderate drought, heat, or drought and heat stress were characterized. Decreased leaf and tuber water potentials were observed at the end of stress treatments. Decreased tuber water potential caused dramatic declines in tuber pressure potential. Tuber sucrose content increased with the severity of stress. Changes in tuber glucose and malic acid contents were also observed. Stress during early tuber bulking had a larger effect on tuber sugars at the end of the stress period than stress during late bulking. Stem-end glucose concentration of tubers at harvest after vine senescence was greater in tubers from plants stressed at early tuber bulking compared to late bulking.