Department of Botany and Microbiology, Auburn University Agricultural Experiment Station, Auburn, Alabama 36830.
Plant Physiol. 1978 Nov;62(5):675-7. doi: 10.1104/pp.62.5.675.
The incorporation of [2-(14)C]malonate and [1-(14)C]acetate into internal lipid and surface wax by cotton leaves (Gossypium hirsutum L. ;Deltapine') having water potentials of -8 to -15 bars (controls) and -19 to -32 bars (water-stressed) was compared. Lipid from stressed leaves contained a mean of 57% more radioactivity than corresponding controls for five experiments. Acetyl coenzyme A carboxylase was not limiting to fatty acid synthesis in water-stressed cotton leaves at the water potential levels tested, whereas fatty acid synthetase was stimulated. In four of six experiments, wax from stressed leaves contained a mean of 38% less radioactivity than nonstressed leaves when incubated 24 hours after rehydration. Evidence is presented to show that after a suitable period of rehydration, previously stressed cotton leaves produce more wax than leaves prior to stressing.
将 [2-(14)C]丙二酸盐和 [1-(14)C]乙酸盐掺入水势为-8 至-15 巴（对照）和-19 至-32 巴（水分胁迫）的棉花叶片（陆地棉 L.；Deltapine'）的内部脂质和表面蜡中进行了比较。在五项实验中，与对照相比，胁迫叶片中的脂质平均含有 57%更多的放射性。在测试的水势水平下，乙酰辅酶 A 羧化酶对水分胁迫棉花叶片中的脂肪酸合成没有限制，而脂肪酸合成酶受到刺激。在六个实验中的四个实验中，与非胁迫叶片相比，胁迫叶片的蜡在复水 24 小时后平均含有 38%更少的放射性。有证据表明，在适当的复水期后，先前受到胁迫的棉花叶片比胁迫前的叶片产生更多的蜡。
