DOES WATER DEFICIT STRESS PROMOTE ETHYLENE SYNTHESIS BY INTACT PLANTS
DOES WATER DEFICIT STRESS PROMOTE ETHYLENE SYNTHESIS BY INTACT PLANTS
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DOI：
10.1104/pp.94.4.1616
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发表时间：
1990-12-01
期刊：
影响因子：
7.4
通讯作者：
DEPROFT, MP
中科院分区：
文献类型：
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作者：
MORGAN, PW;HE, CJ;DEPROFT, MP
在三个物种中测试了植物水分亏缺对完整植物乙烯产生的影响，棉花（Gossypium hirsutum L.）和微型玫瑰（Rosa hybrida L.，cv Bluesette）。使压缩空气通过玻璃、含植物的比色皿，在冷却柱上收集乙烯，随后通过气相色谱法测定。通常的结果是，低水势并不促进乙烯的产生。当植物受到停止灌溉，乙烯产量下降，每株植物或干重计算的基础上。没有显着的促进乙烯生产高于控制水平时，检测到缺水处理的大豆或棉花植株复水。对此的一个例外是，对于经受一系列水分亏缺的棉花，经受-1.4至-1.6MPa亏缺的植物在24或48小时表现出乙烯产量比对照水平高40至50%的瞬时增加。当植物在复水后产生-2.9兆帕斯卡的水分亏缺胁迫时，从完整叶片收集乙烯，并且没有检测到乙烯产生的显著促进。结果，开花棉花植物的芽产生较少的乙烯时，受到停止灌溉。相反，对于豆类和棉花，证实了台架干燥离体叶片使乙烯产生增加数倍的能力。这些数据表明，脱落的叶子反应不同的快速干燥比完整的植物反应干燥的土壤乙烯生产方面。这一结果表明，需要额外注意乙烯作为一个复杂的因素，在实验中采用切除的植物部分，并需要验证模型系统中的冲击应力的相关性。
The effect of plant water deficit on ethylene production by intact plants was tested in three species, beans (Phaseolus vulgaris L.), cotton (Gossypium hirsutum L.) and miniature rose (Rosa hybrida L., cv Bluesette). Compressed air was passed through glass, plant-containing cuvettes, ethylene collected on chilled columns, and subsequently assayed by gas chromatography. The usual result was that low water potential did not promote ethylene production. When plants were subjected to cessation of irrigation, ethylene production decreased on a per plant or dry weight basis of calculation. No significant promotion of ethylene production above control levels was detected when water deficit-treated bean or cotton plants were rewatered. The one exception to this was for cotton subjected to a range of water deficits, plants subjected to deficits of -1.4 to -1.6 MPa exhibited a transient increase of ethylene production of 40 to 50% above control levels at 24 or 48 hours. Ethylene was collected from intact leaves while plants developed a water deficit stress of -2.9 megapascals after rewatering, and no significant promotion of ethylene production was detected. The shoots of fruited, flowering cotton plants produced less ethylene when subjected to cessation of irrigation. In contrast, the ability of bench drying of detached leaves to increase ethylene production several-fold was verified for both beans and cotton. The data indicate that detached leaves react differently to rapid drying than intact plants react to drying of the soil with regard to ethylene production. This result suggests the need for additional attention to ethylene as a complicating factor in experiments employing excised plant parts and the need to verify the relevance of shock stresses in model systems.