Plant Nutrition Physiology Lab

植物营养生理研究组

Research 研究方向

Molecular mechanism of rice nitrogen use efficiency.

     Plant growth, productivity and seed yield depend on the efficient uptake, metabolism, and allocation of nutrients including nitrogen. Plants have evolved efficient and selective transport systems for nitrogen uptake and translocation within the plant to sustain development, growth, and finally reproduction. Development of genetic varieties with improved nitrogen use efficiency (NUE) is essential for sustainable agriculture. NUE can be divided into two parts. First, assimilation efficiency involves nitrogen (N) uptake and assimilation; and second, utilization efficiency involves N remobilization. Understanding the mechanisms regulating these processes is crucial for the improvement of NUE in crop plants. Now, we are focusing on:

(1) Roles of peptide transporter/low affinity nitrate transporter family (PTR/NRT1 family) in N uptake from the soil and in N remobilization in the plant.

(2) Roles of rice autophagy in N recycling.

(3) Roles of microRNAs in root development and NUE.

水稻氮高效利用的分子机制研究

     植物营养利用包括两个方面,一是指从外界吸收各种营养物质加以利用,二是指在特定条件下体内营养物质被重新动员并加以利用。两个方面都对作物经济性状的形成或者在营养逆境等反应中发挥重要作用。我们主要以水稻为材料,研究氮素营养的吸收、转运与代谢的分子机制,以及体内氮素营养的再动员与再循环利用机制,以期培育氮高效利用的水稻新品种,并为农业上提高氮肥利用效率提供理论指导。目前具体研究:

(1) 水稻PTR/NRT1基因家族在氮素吸收、转运及体内氮素营养再循环利用中的作用;

(2)通过对自噬基因家族的研究,揭示水稻体内存贮于大分子中的有机氮再利用的分子机制;

(3) 小分子RNA与植物营养利用及水稻抗逆的关系研究,通过对小分子RNA调节根等的发育,研究小分子RNA在水稻营养利用方面的作用。

 

Rice breeding.

     Breed new hybrid rice with combination of molecular breeding and traditional breeding. We are focusing on breeding: new cytoplasmic male sterile line, restorer line, and the hybrid rice combination for farmers.

水稻新品种的培育

     通过将传统育种方法与分子育种相结合,培育高产、优质、高抗和高效的水稻新品种,并进行示范推广。具体而言:选育新的优良不育系、保持系和恢复系等,配制新的杂交水稻新组合,参加区域试验,通过新品种审定并在农业生产中进行推广种植。