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有些大豆,在筒状试验纸里进行发芽和生长速度的试验时,下胚轴肿大,常呈横向和纵向的破裂。威廉斯栽培品种,在发芽试验的第三天,破裂幼苗仅1%,第七天高达46%。破裂幼苗的数量,随试验纸的湿度增加而增加。发芽期间增加光照,破裂幼苗百分率显著减少。直径大于7.14毫米的种子,下胚轴破裂比小种子数量大。种子水分从12.1%降到6.4%,对幼苗破裂百分率的变化不显著。威廉斯品种的破裂幼苗(17～46%),比Clark63(1～6%)、Evans(1～2%)和Essex(1%)的高。这些数据表明,发芽试验用的试验纸水分是特殊的,把下胚轴生理破裂的幼苗归为正常幼苗是恰当的。
Some soybeans, when tested for their ability to germinate and grow in tubular test papers, have hypoplastic hypocotyls that often rupture transversely and longitudinally. Williams cultivars, breaking the seedlings by only 1% on the third day of the germination test and up to 46% on the seventh day. The number of ruptured seedlings increased with the humidity of the test paper. Increasing light during germination, the percentage of ruptured seedlings was significantly reduced. Seeds larger than 7.14 mm in diameter were hypocotyl broken more than the smaller ones. Seeds moisture decreased from 12.1% to 6.4%, the percentage of seedlings did not change significantly. The breeds of Williams breeds (17-46%) are taller than Clark63 (1-6%), Evans (1-2%), and Essex (1%). These data indicate that the moisture content of the test paper used for the germination test is peculiar and that it is appropriate to classify the hypocotyls physiologically ruptured as normal seedlings.