航天搭载对小桐子种子萌发及幼苗生长的影响

Effects of Spaceship-carried on Seed Germination and Seedling Growth of Jatropha curcas L.

研究了航天搭载对两个种源地小桐子种子萌发及幼苗生长的影响。结果表明：航天搭载降低了种子的活力；在幼苗生长方面，航天搭载对小桐子幼苗的成苗率没有显著影响，航天搭载扩大了版纳种源当代幼苗株高及地径的变异范围，对元阳种当代幼苗的株高及地径影响不明显。这说明不同种源地的植物对太空环境的反应有所不同。本研究为航天技术有效的运用于小桐子诱变育种提供依据。

The seeds of 2 provenances of Jatropha curcas L. carried by spaceship and the effects on the germination and seedling growth were studied. The results showed that the germination rate of 2 provenances of Jatropha curcas L. have reduced, the seedling survival rate has no obvious change. After spaceflight the variation range of seedling growth of Banna provenances have increased, while that of Yuanyang provenances have no obvious change. This means different variations on different provenances caused by space condition. The results provided important experimental basis for mutation breeding of Jatropha curcas L. using space technology.