Sinclair T R, Ward J P, Randall C A
Environmental Physiology Project, United States Department of Agriculture, Agricultural Research Service, Bldg. 164, University of Florida, Gainesville, Florida 32611.
Plant Physiol. 1987 Mar;83(3):467-8. doi: 10.1104/pp.83.3.467.
Short-term studies have indicated that alterations in the oxygen partial pressure (pO(2)) around developing soybean (Glycine max [L.] Merr.) seeds may alter seed growth characteristics. A 2-year field study was undertaken to determine the effects on seed development of long-term exposures of individual pods to either sub-ambient or supra-ambient pO(2). Pod chambers were used through which fixed pO(2) were continuously flowed throughout seed development. No effects on maturity date were observed from exposures to either sub-ambient or supra-ambient pO(2). On the other hand, seed weight was reduced by 0.10 pO(2) in both years of the study implicating an O(2) limitation on seed growth rate at this fairly high pO(2). In 1 of the 2 years, supra-ambient pO(2) resulted in increased seed weight.
短期研究表明，发育中的大豆（Glycine max [L.] Merr.）种子周围的氧分压（pO₂）变化可能会改变种子的生长特性。开展了一项为期两年的田间研究，以确定单个豆荚长期暴露于低于或高于环境水平的pO₂对种子发育的影响。使用了豆荚室，在种子发育过程中，固定的pO₂持续流经豆荚室。暴露于低于或高于环境水平的pO₂均未观察到对成熟日期有影响。另一方面，在该研究的两年中，pO₂每降低0.10均会导致种子重量减轻，这表明在这个相当高的pO₂水平下，氧气对种子生长速率有限制作用。在两年中的一年里，高于环境水平的pO₂导致种子重量增加。
