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首页> 外文期刊>Journal of Stored Products Research >Effect of the absence of lipoxygenase isoenzymes on the storage characteristics of rice grains.
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Effect of the absence of lipoxygenase isoenzymes on the storage characteristics of rice grains.

机译：缺少脂氧合酶同工酶对水稻籽粒贮藏特性的影响。

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摘要

Three varieties of paddy rice with and three varieties without lipoxygenase (LOX) isoenzymes were stored at room temperature, in dark conditions for 42 months. Insect damage and viability were investigated during that time. Varieties without LOX-1,2 and their offspring were screened with a rapid method of estimating LOX isoenzymes, and subjected to an accelerated-ageing experiment. The results indicated that in varieties without LOX-1,2, after long storage, rice quality was normal, but for varieties with LOX-1,2, rice quality deteriorated. With increase of storage time, the germination rate of the seed of most varieties decreased greatly except for varieties without LOX-1,2 where there was almost no change in the germination rate. In varieties without LOX-1,2 and their offspring, after an accelerated ageing experiment the germination rate of some varieties changed slowly, but with others, the germination rate changed quickly. This indicated that a definitive factor, which influenced the life of seeds, may be the loss of LOX-1,2. During storage, there was also a significant difference in the degree of insect damage. In varieties without LOX-3 insect damage was lower, but in varieties with LOX-3 insect damage was higher. Therefore, the absence of LOX-3 may be very important in insect resistance in rice grain.
机译：在室温下，在黑暗条件下，将三种含脂氧合酶（LOX）同工酶的水稻品种和三种不带脂氧合酶（LOX）同工酶的水稻品种在黑暗条件下储存42个月。在此期间调查了昆虫的危害和生存能力。用估计LOX同工酶的快速方法筛选了没有LOX-1,2的品种及其后代，并进行了加速老化实验。结果表明，在没有LOX-1,2的品种中，长时间保存后，稻米品质正常，而对于具有LOX-1,2的品种，米品质下降。随着贮藏时间的增加，除无LOX-1,2的品种发芽率几乎没有变化外，大多数品种的种子发芽率均大大降低。在没有LOX-1,2及其后代的品种中，经过加速老化实验后，某些品种的发芽率变化缓慢，而其他品种的发芽率变化很快。这表明影响种子寿命的决定性因素可能是LOX-1,2的损失。在储存过程中，昆虫的危害程度也存在显着差异。在没有LOX-3的品种中，虫害较低，但是在具有LOX-3的品种中，虫害较高。因此，LOX-3的缺失对于水稻籽粒的抗虫性可能非常重要。

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