| 付丹文袁吴洁芳袁王丽敏袁陈洁珍袁蔡长河袁张春阳袁欧良喜.高温催芽时间对荔枝种子活力的影响[J].广东农业科学,2014,41(16):33-36 |
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高温催芽时间对荔枝种子活力的影响 |
| Effect of high-temperature germination time on litchi seed vigor |
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| DOI： |
| 中文关键词: 高温 催芽时间 荔枝 种子活力 |
| 英文关键词: high temperature germination time litchi seed vigor |
| 基金项目:国家荔枝产业技术体系资源评价科学家岗位项目（nycytx-32）；农业部农作物种质资源保护项目（NB2013-2130135-13）；农业部热带作物种质资源保护项目（13RZZY-05） |
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| 摘要点击次数: 1239 |
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| 中文摘要: |
| 研究了2-7-6荔枝种子在40℃催芽1~8 d后常温催芽40d的发芽率、发芽势、种子活力指数、相对胚根长与长出胚芽天数，对照为室温条件下催芽。结果表明，40℃高温催芽4d对荔枝种子的发芽率没有影响，超过4d种子的发芽率降低，种子的发芽势随着高温催芽时间的延长呈现下降趋势；荔枝种子可耐40℃高温的临界时间为2d，超过2d种子的活力指数与相对胚根长迅速下降；高温催芽1~2 d对荔枝种子胚根生长抑制效果较小，当高温催芽时间大于4d时胚根几乎停止生长；40℃高温催芽1~2 d会推迟荔枝种子胚芽长出的时间，但能提高胚芽长出的整齐度，40℃高温催芽超过2d种子长出胚芽的整齐度开始降低，随着高温催芽时间的延长，荔枝种子长出胚芽的时间延后，整齐度也有一定程度的下降。 |
| 英文摘要: |
| The article studied the germination rate, germination energy, seed vigor index, relative radicle length and
budding days of 2-7-6 litchi under the condition of 40益to germinate 1~8 d and stored at room temperature for 40 days,
while CK was under the room temperature with storage. The results showed that litchi seed germination percentage was not
affected by 40益germination for 4 d, germination rate would reduce in 40益germination for more than 4 d, germination
energy of litchi decreased with germination time going on. The critical time of litchi seeds resistant to temperature of 40益
was 2 d, after 2 d, the activity index and relative radicle length of seeds decreased rapidly. High temperature germination
for 1~2 d had smaller inhibition effect on the growth of radicle, radicle almost stopped growing when germination time was
more than 4 d in high temperature. The high temperature of 40益germination for 1~2 d would delay the germ emergence,
but it could improve the germ uniformity. Germ uniformity decreased with the germination time for more than 1~2 d in high
temperature of 40益. The litchi germ emergence delayed and uniformity declined with the increase of germination time. |
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