提高黄皮种子活力的途径

THE WAYS TO INCREASE VIGOUR OF WAMPEE (CLAUSEAN LANSIUM) SEEDS

摘要:

黄皮种子经脱水至40％左右或持续贮藏（一年以上）后种子活力迅速下降，PEG对劣变种子直接引发不但不能提高其活力，反而使其活力更为下降，甚至丧失萌发能力而引发加速了代谢物质的消耗和渗漏。在黄皮种子脱水前用ABA、Ca2+、茶多酚（抗氧化剂）预处理，明显降低了黄皮种子的脱水敏感性。结合用PEG引发技术，则能较大幅度提高黄皮种子脱水后的活力，Ca2+短时高温引发也能提高黄皮种子贮藏一年后的活力，说明预处理是提高脱水和贮藏后黄皮种子活力的必要措施。

Abstract:

The vigour of wampee seeds decreased rapidly as moisture content was reduced to about 40% after desiccation, or after continued storage for one year or more. Direct PEG priming could not improve but decrease the vigour of deteriorated wampee seeds,even made their germinability lost. The experiments showed that the solute leakage of wampee seeds or excised embryos increased greatly after priming. The pretreatments with ABA, Ca2+ or tea polyphenol before desiccation obviously reduced the desiccation sensitivity of seeds, and those in combination with PEG priming after desiccation could markedly increase the vigour of the seeds. In comparison with control, the short-term and high-temperature priming with Ca2+ before storage improved the vigour of seeds preserved after one year. The results showed that the pretreatments before desiccation were necessary for increasing the viability of wampee seeds.