【摘要】 锌是植物必需的营养元素,也是重金属污染元素之一。现代分子生物学的发展,极大地推动了植物体内与锌吸收运输有关转运蛋白的研究。目前发现,锌铁控制运转相关蛋白（ZIP）、自然抵抗相关巨噬细胞蛋白NRAMP、重金属ATPase酶、阳离子扩散协助蛋白CDF、Mg²⁺/H⁺的反向交换转运蛋白MHX等运输蛋白参与细胞内Zn²⁺离子的跨膜运输,调节植物细胞内Zn²⁺平衡与分配。利用数量遗传学手段在在水稻上已找到与缺锌植株死亡率和叶片青铜病发生率有关QTL位点。而在Thlaspi caerulescens和Arabidopsis halleri植物上鉴定出控制锌含量的QTLs,为寻找控制植物高效积累Zn的遗传基础规律打下了基础。更多还原

【Abstract】 Zinc（Zn）is an essential plant element,but it is toxic to plants in excess.Plants have complicated Zn trans- port and regulation systems to maintain a proper intracellular concentration of zinc.Some genes have been indentified in plants encoding proteins with putative roles in Zn transport,such as ZIP（Zinc-regulated transporters,Iron-regulated transporter-like protein）,NRAMP（Natural resistance-associated macrophage proteins）,P_iB-type heavy metal associated domain containing ATPases,cation diffusion facilitator（CDF）,and Mg²⁺/H⁺ exchanger（MHX）.The quantitative trail loci（QTL）analysis is being used to find the loci controlling Zn accumulation in heavy metal hyperaccumulator Thlaspi caendescens or Arabidopsis halleri.Some QTLs associated with plant mortality and leaf bronzing are detected in Zn defi- cient rice plants.更多还原