植物锰转运蛋白研究进展

Research Progress on Manganese Transporters in Plants

锰是植物必需的微量元素,参与植物的多种生命活动过程,包括光合作用、呼吸作用、蛋白质合成和激素活化等。锰缺乏和过量均能影响植物生长和产量。但是目前对锰在植物中吸收、转运过程的分子机制仍了解有限,少数金属转运蛋白家族被报道参与锰在植物体中的吸收、转运和分配,如NRAMP (natural resistance associated macrophage protein), YSL (yellow stripe-like),ZIP (zinc regulated transporter/iron-regulated transporter [ZRT/IRT1]-related protein),CDF/MTP (cation diffusion facilitator/metal toleranceprotein),CAX (cation exchanger),CCX (calcium cation exchangers),P-type ATPases和VIT (vacuolar iron transporter)。本文主要综述模式植物拟南芥和水稻中锰转运蛋白对锰吸收、分配和维持植物体内锰平衡方面的研究进展,并对相关研究进行展望。

Mn is an essential nutrient which is needed for a variety of life processes in plants, including photosynthesis,respiration, protein synthesis and hormone activation. Mn deficiency or Mn toxicity could affect plant growth and yield.However, relatively little is known about manganese uptake and mobilization in plants. Several transporter protein families have been implicated in Mn uptake and mobilization in plants. These transporter families include NRAMP(natural resistance associated macrophage protein), YSL(yellow stripe-like), ZIP(zinc regulated transporter/iron-regulated transporter [ZRT/IRT1]-related protein), CDF/MTP(cation diffusion facilitator/metal toleranceprotein), CAX(cation exchanger), CCX(calcium cation exchangers), P-type ATPases and VIT(vacuolar iron transporter). This mini review summarized the recent progresses in researchers on these proteins and their roles in the uptake, mobilization,homeostasis of Mn in plants, particularly in the model plants of Arabidopsis thaliana and rice. Prospects on the researches were also discussed.