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茭白孕茭前后植株叶片和叶鞘器官中游离氨基酸和总糖含量的变化 总被引:4,自引:0,他引:4
试验比较了“河姆渡”双季茭在孕茭前和膨大期植株叶片和叶鞘中营养成分的变化。结果表明:(1)膨大期茭白叶鞘和叶片内的总糖含量分别比孕茭前显著增加99.07%和123.79%(P<0.05);(2)膨大期,叶鞘内总糖的含量显著大于叶片中总糖的含量,增加达18.1%(P<0.05);(3)孕茭前和膨大期相比.茭白叶片内游离氨基酸的组成和含量无显著差异;但叶鞘内游离氨基酸的组成和含量却差异显著(P<0.05),氨基酸总量提高了127.8%;(4)膨大期与孕茭前相比,叶鞘中有6种氨基酸的含量增幅最大,依次是:谷氨酸(Glu;610.0%)>甘氨酸(Gly;303.6%)>丙氨酸(Ala;228.7%)>赖氨酸(Lys;207.2%)>丝氨酸(Ser;203.7%)>天门冬氨酸(Asp;172.0%);其中,丝氨酸含量最高,孕茭前和膨大期分别占氨基酸总量的34.81%和46.42%;(5)膨大期与孕茭前相比,叶片和叶鞘中脯氨酸(Pro)、精氨酸(Arg)和亮氨酸(Leu)含量均有明显降低。 相似文献
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<正> 2010年9月28日至29日,中科院院士谢联辉一行在福建省老科协陈奎副会长等领导的陪同下到政和县考察指导锥栗生产工作。政和县是福建省第二个锥栗之乡,全县种植面积15万亩,2009年投产面积10万亩,产量9500吨,产值3000多万元,锥栗生产成了政和农民新的收入增长点。近年来,由于发生两种病害,一是在6月下旬至7月上中旬发生大量落苞现象,二是在锥栗果仁膨大期栗苞生长发育受阻,栗苞发黑 相似文献
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以超汴椒 1号为试验材料 ,研究了同位叶、果及不同种植密度对辣椒单果鲜重、干物质、体积、品质、籽粒数的影响。结果表明 :处理 (开花座果 )后 2 0天 ,剪半叶、剪全叶、果实遮光处理的果实鲜重比对照分别降低了 15 .6 %、33.0 %、2 5 .9% ,干物质比对照分别降低了 18.9%、34.9%、2 3.4 % ;不同处理的辣椒体积、籽粒数不同 ,同时辣椒的品质也有差异 ,而种植密度对辣椒单果重无显著影响。 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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以超汴椒1号为试验材料,研究了同位叶、果及不同种植密度对辣椒单果鲜重、干物质、体积、品质、籽粒数的影响。结果表明:处理(开花座果)后20天),剪半叶、剪全叶、果实遮光处理的果实鲜重比对照分别降低了15.6%,33.0%,25.9%,干物质比对照分别降低了18.9%,34.9%,23.4%;不同处理的辣椒体积、籽粒数不同,同时辣椒的品质也有差异,而种植密度对辣椒单果重无显著影响。 相似文献
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在大田地膜洋葱葱头膨大期发放三元能量,使葱头产量提高11.35%,个体均重提高9.37%、大中型葱头比率提高;对葱头及其生育植株发放三元能量可显著提高洋葱花头的产籽量,增长率为25.00% ̄51.71%。 相似文献
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