Department of Horticulture, Michigan State University, East Lansing, Michigan 48823.
Plant Physiol. 1973 Jan;51(1):57-60. doi: 10.1104/pp.51.1.57.
Seed of a Mexican semidwarf wheat (Triticum aestivum L. cv. Inia 66), was obtained from a nitrogen fertilizer field trial grown in Mexico. A high positive correlation was obtained between seed protein content and seedling dry weight after 3 weeks growth (r = +0.92(**)). The seedling dry weight was positively related to the protein content of the aleurone layer and endosperm, but not to the embryo. Small, 35 milligrams, high protein seeds (4.7 milligrams protein per seed) produced larger seedlings than large, 45 milligrams, low protein seeds (4.3 milligram protein per seed). There was no difference in the weight or protein content of embryos from low and high protein seeds and their growth was similar. Composite seeds of the two protein levels were produced by transferring embryos from one endosperm type to the other. After 4 weeks, there was no difference between the different embryo types grown on the same endosperm type. High protein endosperm produced more vigorous seedlings regardless of the embryo type grown on it, indicating that the factor(s) responsible for the greater growth of high protein seed is in the endosperm.
从墨西哥氮肥田间试验中获得了一种墨西哥半矮秆小麦（Triticum aestivum L. cv. Inia 66）的种子。在经过 3 周的生长后，种子蛋白质含量与幼苗干重之间呈高度正相关（r = +0.92（**））。幼苗干重与糊粉层和胚乳的蛋白质含量呈正相关，但与胚无关。小而高蛋白的种子（每粒种子 4.7 毫克蛋白质）比大而低蛋白的种子（每粒种子 4.3 毫克蛋白质）产生的幼苗更大。高蛋白和低蛋白种子的胚的重量或蛋白质含量没有差异，它们的生长情况也相似。通过将胚从一种胚乳类型转移到另一种胚乳类型，可以产生两种蛋白质水平的复合种子。4 周后，在相同的胚乳类型上生长的不同胚类型之间没有差异。高蛋白胚乳无论生长在何种胚上，都能产生更健壮的幼苗，这表明高蛋白种子更大生长的原因（s）在于胚乳。
