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| | The results of solution culture showed that the critical value of the high Zinc concentration tolerance of wheat (the cultivers of Mian Yang 11 and 15 )was 600 ppm. The seedlings grew normally at the concentration of Zinc from 0.05 to<400 ppm. The Zinc toxicity symptom occurred in different extent when the Zn~(2+) of concentration of 400 ppm and 600 ppm was added to the culture solutions. For the treatment of 600 ppm Zn~(2+) the symptom was most severe and occurred most early, leaf withering appeared 3 days... | | 水培结果表明,绵阳11和15号小麦耐有效锌的临界值为600ppm。在0.05—400ppm以内。幼苗生长正常,400ppm时,便出现锌中毒症状,至600ppm时,症状最严重,显症时间最早,从培养第3日起,植株开始枯萎,到第9日,焦叶指数和蔫萎指数均达三级,植株含锌量达6674ppm;而400ppm处理的,症状较轻,植株含锌量明显下降,为6185ppm。加钙处理(500ppmCa~(2+)),使症状加剧,显症提前,植株含锌量相应增高。加0.1%EDTA处理,使症状减轻,推迟显症,植株含锌量下降;在最高锌量(600ppm)加EDTA处理,较其它处理的植株,症状最轻、最迟,含锌量最低。 | | 文摘来源 | | The selection of NaCl-tolerant mutants in wheat was studied,A number of NaCl-tolerant cell lines were selected from a great quantity ofcallus cultures.The NaCl-tolerance of 5 lines were stable and very strongafter subculture of three times. The plants were regenerated on 1.0%NaCl-containing media.The NaCl-tolerance appeared in the callus from embryos of three plants regenerated.Two of the three plants which could pass on the NaCl-tolerance to next generation through gametophyte are preliminarily considered ... | | 运用组织培养研究了小麦耐盐(NaCl)突变体的筛选,获得了大量耐盐细胞系,其中有5个系的耐盐性稳定而且较强,其余的系在以后继代培养中耐盐性逐步消失。耐盐稳定的细胞系在含NaCl的培养基中再生了植株,其中三棵植株表现了耐盐特性,而且两株的耐盐性通过有性世代仍保留,初步确定为遗传的耐盐特性突变体。在试验中采用了60Co γ射线辐照幼穗,结果表明1kR比较有效。 | | 文摘来源 | | Investigation on rice and wheat growth with varied concentrations of Zn added and effect of Zn accumulation in soil and plant was carried out. The results are as follows:1. Available Zn content in soil increased with the increase of concetration of Zn added. Accumulation rate of available Zn in the Black Clay Soil was 4 times that of Yellow Sand Soil. 2.The rice grew fine on soil containing high Zn (40ppm). Wheat injury occurred when available zinc values of the Black Clay Soil is higher than 8.04ppm, while... | | 以两种性质不同的水稻土为材料,研究水稻和小麦在不同锌用量环境中的生长情况,以及锌在土壤、植株中积累的状况。结果如下:(1)土壤有效锌随施锌量的增加而增加,增加的幅度因土壤类型而异,黑粘土有效锌积累率为35.4%,是黄砂土的4倍。(2)水稻能在所设计的锌用量范围内正常生长。小麦耐锌能力因土壤类型而有很大差异,_黄砂土上的小麦表现出较强的耐锌能力,黑粘土施锌量在20mg/kg土时,小麦出现受害现象。(3)糙米含锌量为17.8~33.15ppm,麦粒含锌量17.02~66.72ppm,黑粘土Zn_(20)和Zn_(40)处理的麦粒中锌已超过自然含量范围。 | | 文摘来源 | |   | | << 更多相关文摘 |
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