| 马铃薯实生种子活力的研究 |
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| 引用本文： | 蒙美莲,门福义,刘梦芸.马铃薯实生种子活力的研究[J].中国马铃薯,1988(4). |
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| 作者姓名： | 蒙美莲 门福义 刘梦芸 |
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| 作者单位： | 内蒙农牧学院，内蒙农牧学院，内蒙农牧学院 |
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| 摘 要： | 本试验以贮藏不同年限的马铃薯实生种子为材料,对其活力和反映活力状况的若干生态和生理生化指标进行了研究,从种子活力的角度测定了种子的实用价值。主要结果是:马铃薯实生种子随着贮藏年限的延长,其发芽率、发芽势、发芽指数、活力指数渐趋降低,幼苗生长速度减慢;砂培出苗率和出苗整齐度比普通发芽试验的发芽率和发芽势更能确切地反映种子的活力;随着种子活力的下降,其内部的脂肪酸价升高,种子浸出液的相对电导率增大;活力高的实生种子,其过氧化物酶同工酶酶带较活力低的实生种子数量多,颜色深,酯酶同工酶亦有相似的结果;同薯8号和克疫两品种的实生种子活力下降的速度不同,前者慢、后者快;马铃薯实生种子在一般室内温湿度贮藏条件下,经8年或更长时间贮藏后,仍具有种用价值,可作播种材料;马铃薯实生种子活力的测定,采用活力指数或发芽指数较其它生态指标更具有适用性和可靠性。脂肪酸价和相对电导率作为活力测定的生理生化指标对劣变速度快的实生种子是灵敏而适用的。
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STUDIES ON THE VIGOR OF POTATO TRUE SEED |
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| Abstract: | In this experiment,the vigor of potato true seed stored for different number of years and the physiological and biochemical index of the vigor have been studied.In addition,the use value of the seed for several years has been evaluated by its vigor.The main results are as follows: 1.With the number of stored years increasing,the germination percen- tage,germination power,germination index and the vigor index of the true seed of potatoes,and seedling growth speed fall gradually,indicating that the seed vigor falls. 2.For representing the vigor of seed,the emergence percentage and the emergence uniformity test in sand culture are more exact than the germination percentage and the germination power in general germination test. 3.With falling of the vigor,the fat acidity of seed increases,and the relative electric conductivity of the liquid soaked out of seed also increases. 4.The peroxide isozyme of high vigor seed shows more number of bands, and each band shows deeper colour,than that of low vigor seed.So does the esterase. 5.The vigor falling speed of Junshu NO.2 is different from that of kuannae,the former is slower than the latter. 6.The potato true seed stored under condition of room temperature and humidity for eight years or more still be able to be used as seed to sow. 7.For indicating the vigor of potato true seed,it is more applicable and more reliable to use vigor index or germination index than other index.It is sensitive and applicable to use fat acidity and relative electric conductivity as physiological and biochemical index of vigor for quickly deterioration seed. |
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