盐胁迫对台湾海桐幼苗营养吸收和可溶性总糖含量的影响

Effect of Salt Stress on Nutrient Absorption and Soluble Sugar Content of Pittosporum pentandrum Seedlings

以温室里1年生的台湾海桐盆栽苗为试材,设置0、6、9、12 g/kg和15 g/kg 5个盐浓度梯度对其进行胁迫处理,测定其营养元素和可溶性总糖含量。结果表明:不同浓度梯度盐胁迫下,台湾海桐幼苗的Na+含量随盐浓度升高而增加,而K+含量,叶和根中的Ca2+和Mg2+含量,Fe、Cu、Mn和Zn含量以及可溶性总糖含量均降低;低盐胁迫促进植株对P、N元素的吸收,高盐浓度则起抑制作用。

The contents of nutrients and soluble sugar of the 1a pot grown Pittosporum pentandrum seedlings which were kept in the green house and treated with salt solutions with 5 concentrations,i.e.,0 g/kg,6 g/kg,9 g/kg,12 g/kg and 15 g/kg dry weight of soil were measured.The results showed that the contents of Na＋ increased,whereas the contents of K＋,Ca2＋,Mg2＋ contents in the seedling leaves and roots,as well as the contents of Fe,Cu,Mn,Zn and soluble sugar decreased with the increment of salt solution concentration.It was showed that the low concentration salt stress could promote the seedlings to absorb P and N nutrient elements,while the high concentration salt stress would inhibit the nutrient absorption.