| 干旱对沙棘休眠、萌芽期内源激素及萌芽特性的影响 |
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| 引用本文： | 李丽霞,梁宗锁,韩蕊莲.干旱对沙棘休眠、萌芽期内源激素及萌芽特性的影响[J].林业科学,2001,37(5):35-40. |
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| 作者姓名： | 李丽霞 梁宗锁 韩蕊莲 |
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| 作者单位： | 中国科学院水利部水土保持研究所 |
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| 基金项目： | 中国科学院知识创新项目 (KZXC1 0 6 )，西部之光人才培养基金，黄河上中游管理局科研基金 ( 19970 0 1)资助 |
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| 摘 要： | 以2a生中国沙棘为试验材料，研究了土壤干旱胁迫下沙棘苗木水分生理状况、内源GA1／3及ABA水平与萌芽率的关系，结果表明：土壤干旱胁迫导致苗体含水量、水势、自由水含量下降，显著提高冬季休眠与春季萌动期的内源ABA水平而降低内源GA1／3含量，GA1／3ABA降低，较晚达到萌动所需的调控阈值，萌芽延迟。重度胁迫下苗木延迟达25d且萌芽后生化缓慢。长期土壤中度干旱条件下沙棘苗萌芽期亦略有延迟，萌芽后生长略有抑制。
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| 关 键 词： | 土壤干旱 内源激素 休眠期 萌芽期 沙棘 |
| 修稿时间： | 2000年8月8日 |
EFFECT OF SOIL DROUGHT ON ENDOGENOUS HORMONE AND SPROUT CHARACTER IN DORMANCY AND SPROUT PERIOD OF SEABUCKTHORN SEEDLINGS |
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| Li Lixia,Liang Zongsuo,Han Ruilian.EFFECT OF SOIL DROUGHT ON ENDOGENOUS HORMONE AND SPROUT CHARACTER IN DORMANCY AND SPROUT PERIOD OF SEABUCKTHORN SEEDLINGS[J].Scientia Silvae Sinicae,2001,37(5):35-40. |
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| Authors: | Li Lixia Liang Zongsuo Han Ruilian |
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| Abstract: | Relationship between water status, endogenous hormone and sprout rate of 2 years old China seabuchthorn under water deficit was analyzed. The main results are: water deficit made water content, free water, water potential and endogenous GA 1/3 of seabuckthorn seedlings decreased, while endogenous ABA level increased obviously during dormancy stage in winter and sprout period in spring, so ratio of GA 1/3 /ABA droped and came to threshold value later. As a result, the germination day delayed, especially that of seedlings under serious water deficit was postponed even for 25 days. Besides, seedlings grew slowly after sprout. Seabuckthorn suffered slight injure from a long time of medium soil water stress and sprout date was also delayed a few days and growth after sprout was restrained to a small extent. |
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| Keywords: | Soil drought Endogenous hormone Dormancy stage Sprout period Seabuckthorn |
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