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采后生物技术——解决果蔬保鲜的新方法 总被引：1，自引：0，他引：1
果蔬采后生物技术是分子生物和生物技术在果蔬采后生理(采收以后的果实蔬菜生理现象)及贮藏保鲜理论研究和实践上的应用,是目前国内外从事果蔬采后生理研究工作的一个最为活跃的领域。采后生物技术的建立,为探索果实成热衰老的本质以及有效调控果蔬产品的采后成熟衰老过程,最终达到贮藏保鲜的目的带来了新的希望,并显示出极大的前景。 相似文献
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近年来,随着新科学、新技术的发展,一些新名词也不断出现,“转基因食品”一时也成了千家万户知晓和关心的话题。这并不足为奇。但如果有一天,你在超市里拿起一瓶番茄酱仔细端详的时候,热情而周到的营业员轻描淡写地跟你推荐说,这是新品种,很畅销,因为这种番茄里有人的基因,你会不会大吃一惊呢? 相似文献
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Fruit ripening is a complex process and is regulated by many factors.Ethylene and polygalacturonase (PG),lipoxygenase (LOX),expansin (EXP) are all critical regulating factors in fruit ripening and softening process.With antisense,ACS tomato,Nr mutant tomato and cultivated tomato as materials,Northern blot hybridization showed that PG,LeEXP1 and LOX expressed differently in different parts of cultivated tomato fruit during ripening,which was related to fruit ripening.The ripening process of columella and radial pericarp was faster than pericarp.In both Nr mutant and antisense ACS transgenic tomato fruit,expression levels of PG,LeEXP1 and LOX were generally lower than those in cultivated fruit but still related to fruit ripening.The expression levels of PG,LeEXP1 and LOX increased in the mature green tomato fruits after 0.5 h treatment with ethylene ( 100 μL/L).These results indicate that gene expression of PG,LeEXP1 and LOXwere positively regulated by ethylene.The time and cumulative effect of the concentration exists in the expression of PG regulated by ethylene.The regulation of LOX expression mainly depended on the fruit development after great amount of ethylene was produced.PG played a major role in ripening and softening of tomato fruit,and cooperated with the regulation of EXP and LOX. 相似文献
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本文这道几何题的多种解法,对提高学生的解题的.浓厚兴趣,拓广学生的思维,活跃学生的思维,培养学生的思维能力.均有很好的促进作用;同时,可使学生学习到添加辅助线的技能技巧,从而达到调动学生解题的积极性和灵活思维,创造思维的目的. 相似文献
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