Growth and Survival Rate after Maturity in Oryza sativa L. and O. glaberrima Steud.
Growth and Survival Rate after Maturity in Oryza sativa L. and O. glaberrima Steud.
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Oryza sativa L. 和 O. glaberrima Steud 成熟后的生长和存活率。
DOI：
10.1626/jcs.68.257
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发表时间：
1999
影响因子：
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通讯作者：
Yasuo Takasaki
中科院分区：
文献类型：
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作者：
J. Sakagami;A. Isoda;H. Nojima;Yasuo Takasaki
10个品种O. sativa（6个粳稻、2个籼稻和2个粳稻×籼稻）和5个O.在盆中种植光果莲。每个品种的一半在成熟时在地面以上10厘米处切割，另一半保持不切割。两者都生长在两个不同的日长条件下，一个合适的温度。测定了成熟期的生长状况、成熟后的分蘖数变化和成熟后的成活率。成熟期水稻茎（茎+叶鞘）中淀粉含量有高于普通水稻的趋势。glaberrima。成熟期茎段节位上的节根数和分蘖芽的总叶长均以O. sativa比O. glaberrima。两个品种都出现了新的分蘖。sativa和O.成熟后的光裂。成熟后的分蘖数以O. sativa比O. glaberrima，虽然这种关系在长日照未切割的地块中由于来自较高节的新分蘖的出现而在一段时间内被逆转。长日照和未收割的条件提高了分蘖的存活率。号手术glaberrima，成熟后250 d的成活率均为零。号手术成熟后250 d，粳稻品种的成活率高于籼稻品种，包括粳×籼稻品种。部分籼稻品种在成熟后250天内全部死亡。长日照条件有利于存活率。新分蘖的持续出现是O. sativa和O. glanberrima成熟后，表明O. sativa和O.光裂草具有潜在的多年生能力。推测O. glaberrima与O. sativa.同时也表明，野生稻的成活率存在品种间差异。sativa.
Ten cultivars of O. sativa (6 japonica, 2 indica, and 2 japonica×indika) and five cultivars of O. glaberrima were grown in pots. Half of each cultivar was cut at 10 cm above the ground at maturity, and the other half remained uncut. Both were grown under two different day-length conditions with a suitbable temperature. The growth state at maturity, the changes in the number of living tillers after maturity, and the survival rate after maturity were examined. The starch content in the stem (stem+leaf sheath) of O.sativa at maturity tended to be higher than that of O. glaberrima. The nodal root number and the total leaf length of the tiller bud from the node of a stem section at maturity were greater in O. sativa than in O. glaberrima. New tillers appeared in both O. sativa and O. glaberrima after maturity. The number of living tillers after maturity was always greater in O. sativa than in O. glaberrima, though the relation was reversed for some period in the long day uncut plot because of the appearance of new tillers from higher nodes. The long day and the uncut conditions enhanced the survival of tillers. In O. glaberrima, the survival rate of all cultivars at 250 days after muaturity was nil. In O. sativa, japonica cultivars were higher than indica cultivars, including japonica×indica cultivars in the survival rate at 250 days after maturity. All plants of some indica cultivars had died before 250 days after maturity. The long-day condition favored the survival rate. The continued appearance of new tillers in both O. sativa and O. glanberrima after maturity suggested that both O. sativa and O. glaberrima had potential perennial ability. It was inferred that the pernnial ability of O. glaberrima was very small compared with that O. sativa. It was also inferred that varietal differences in the survival rate existed in O. sativa.