盐碱胁迫下水稻籽粒中磷积累及与其他元素间的关系研究

Phosphorus accumulation in rice grains and its relationships with other mineral elements under salt-alkaline stress

矿质元素如磷(P)、钾(K)、钠(Na)、钙(Ca)、镁(Mg)、铁(Fe)、锰(Mn)和锌(Zn)等是作物生长发育所必需的,其中P是作物所需的3大营养元素之一,同时作物吸收的各矿质元素之间存在一定的相关性和依存关系。在大田条件下,以吉农大511、松粳14、龙稻11及松粳12水稻品种为研究对象,分析了盐碱胁迫下不同水稻品种稻壳及糙米中的全磷(TP)含量及TP与其他矿质元素之间的关系。结果表明,盐碱胁迫显著降低了糙米中TP的含量(P<0.05),同时也表现出品种间的差异;盐碱胁迫影响了稻壳和糙米中TP与其他矿质元素间的关系;无论盐碱还是非盐碱胁迫下对糙米中TP含量贡献最大的均为Mg元素。

Mineral elements such as phosphorus(P),potassium(K),sodium(Na),calcium(Ca),magnesium(Mg),iron(Fe),manganese(Mn)and zinc(Zn)are necessary for the growth and development of crops,and P is one of the three major nutrient elements essential to crops.There exists a certain correlation and dependence among the mineral elements absorbed by crops.Under field conditions,we planted four rice varieties,including JiNongDa 511,SongJing 14,LongDao 11,and SongJing 12 in saline-alkaline and non-saline-alkaline soils,and investigated the effects of saline-alkaline stress on total P(TP)content in rice grains and the correlation between TP and other mineral elements.The results showed that saline-alkaline stress significantly reduced the content of TP in brown rice(P<0.05),with significant differences among varieties.The relationship between TP and other mineral elements were significantly influenced in rice husk and brown rice under salt and alkali stress.The Mg element contributed the most to the TP content in brown rice under saline-alkaline and non-saline-alkaline stresses.