不同品种菊芋对海水处理响应的生理指标筛选

试验采用温室水培试验的方法，系统评价了7个典型品种菊芋对0.15％，30％海水的响应，并对不同品种菊芋对海水处理响应的生理指标进行了筛选。结果表明：在15％和30％海水处理下地上部和根鲜重、干重、含水率较对照降低，30％海水处理下更显著，而地上部和根Na^＋和Cl^-含量随海水浓度增加显著增加，在15％和30％海水处理下菊芋幼苗地上部和根K^＋含量均高于对照处理。菊芋幼苗地上部和根鲜重和干重与根部Na^＋含量呈极显著负相关，地上部和根鲜重与地上部和根部Cr含量呈显著负相关，地上部和根干重与地上部和根部K^＋含量呈显著正相关。根据菊芋在海水处理下的表现分为3种类型：高度耐海水型、中度耐海水型和低度耐海水型。在评价不同基因型菊芋对海水的响应时，地上部和根鲜重、干重及含水率的下降幅度和Na^＋、K^＋和Cl^-含量可作为主要的生理指标。

Selection of Physiological Indices for Response of Helianthus tuberosus L.with Different Varieties on Seawater Treatment

Pot experiments were carried out to study the response of Helianthus tuberosus of seven varieties and to select the physiological indices of H.tuberosus for response on seawater treatment.Results were as follows:(1) Compared with the control,the fresh and dry weights and the water contents of shoots and roots of H.tuberosus seedlings treated with 15% and 30% seawater decreased, especially with 30% seawater treatment.Contents of Na~ and Cl~-in the shoots and roots increased with seawater concentration increasing.The contents of K~ in the shoots and roots under 15% and 30% seawater were higher than those under 0% seawater.There was significantly negative correlation between the fresh and dry weight of shoots and roots of H.tuberosus seedlings and the contents of Na~ in the roots.And there was significantly negative correlation between the fresh weights of shoots and roots of H.tuberosus seedling and the contents of Na~ in shoots and roots.There was significantly positive correlation between the dry weights of shoots and roots of H.tuberosus seedling and the contents of K~ in shoots and roots.Based on those,the H.tuberosus of seven varieties tested could be divided into three groups,such as high seawater-tolerance,intermedia seawater-tolerance and low seawater-tolerance.There was different response on seawater treatment about the katabatic scopes of fresh weight and dry weight and the contents of water and contents of Na~ ,K~ and Cl~-in the shoots and roots among the variances of H.tuberosus.Thus,the katabatic scopes of fresh weight and dry weight and contents of Na~ ,K~ and Cl~-in the shoots and roots could be used as physiological indices for selecting different genotypes of H.tuberosus for responses on seawater treatment.