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首页> 外文期刊>Protoplasma: An International Journal of Cell Biology >Phytochrome-mediated long-term memory of seeds
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Phytochrome-mediated long-term memory of seeds

机译：植物色素介导的种子长期记忆

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摘要

The question is how long phytochrome, stored within the cytoplasm of plant diaspores, may stimulate their germination. This question arose from the observation that soil cultivations in darkness for weed control gave inconsistent results. Namely, after a single nighttime or daytime cultivation during spring and summer, differences in weed emergence became hardly detectable after a period of six weeks. However, after nighttime and daytime cultivations in late autumn, emergence differences persisted for up to nine months. To examine whether this differing memory effect is phytochrome-mediated, seeds of Chenopodium album and Stellaria media were sown in pots with wet peat, either in daylight or after sunset. In the latter, seeds were irradiated with far-red light for one day prior to being covered and buried. For more than two years the far-red irradiated seeds produced significantly reduced emergence, indicating that germination and emergence of weeds in the field may be supported by maternal far-red absorbing seed phytochrome B-fr over several months or even years. This conclusion allows refining of the strategy of lightless tillage.
机译：问题是，植物diaspore的细胞质中存储的植物色素可以刺激其发芽多长时间。这个问题来自观察到在黑暗中用于杂草控制的土壤种植结果不一致。即，在春季和夏季进行单一夜间或白天栽培后，经过六周的时间，杂草出苗的差异变得几乎无法检测到。但是，在深秋的夜间和白天耕种之后，出苗差异持续了长达9个月。为了检查这种不同的记忆效应是否是由植物色素介导的，在白天或日落之后，将种子叶白藜和Stellaria的种子播种在湿泥炭的盆中。在后者中，将种子用远红光照射一天，然后覆盖并掩埋。两年多来，远红外辐射种子产生的出苗量大大减少，表明田间杂草的发芽和出苗可能受到几个月或什至几年内母体吸收远红外种子的植物色素B-fr的支持。这一结论使精细耕作策略得以完善。

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