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Shihezi University (石河子大学) 2021

Mechanisms of Rapid Growth and Stress Tolerance in Arabidopsis Pumila,a Typical Ephemeral Plant in Xinjiang Desert Environment

金玉环

Titre : Mechanisms of Rapid Growth and Stress Tolerance in Arabidopsis Pumila,a Typical Ephemeral Plant in Xinjiang Desert Environment

Auteur : 金玉环

Grade : Doctoral Dissertation 2021

Université : Shihezi University (石河子大学)

Résumé partiel
In recent years,climate change has led to an increase in extreme weather,and the growing global population has brought unprecedented challenges to agricultural production.Crop genetic improvement can promote food and nutrition security,which has become one of the important issues concerned by scientists.However,the current crop breeding strategy lacks sufficient efficiency,and it is difficult to meet the short-term or long-term food production needs.It is necessary to combine traditional breeding,modern biotechnology,genomics research and“speed breeding”to accelerate the process of crop improvement,which help us meet the challenge of food demand of 10 billion people.Genomics can maximize the effective utilization,diversity,grain yield and security of resources,but it is necessary to identify as many germplasm resources as possible at the level of genome and agronomic traits,so as to explore and identify more excellent gene resources for crop genetic improvement in the future.Marginal land is a strategic reserve cultivated land resource to ensure China’s food security.There are30.752 million mu of marginal land in Xinjiang,and saline alkali,Sandy and drought are the main obstacles.Ephemeral plants are widely distributed in the margiinal of Xinjiang,China.They play important roles in preventing wind and fixing sand,conserving soil and water,improving micro habitat and protecting surrounding farmland from sand damage.Therefore,they have made important contributions to the protection of agricultural biology and ecological environment especially in early spring in Xinjiang.Study of the molecular mechanism of ephemeral plants adaptation to the environment will provide scientific basis and theoretical support for better utilization and protection of ephemeral plant resources,which is of great significance for future crop breeding and development and utilization of marginal lands.Arabidopsis pumila,a cruciferous plant growing in the desert area on the southern edge of Gurbantunggut Desert,is characterized by rapid flowering and fruit bearing,large fruiting capacity,high photosynthetic efficiency,salt tolerance,and cold resistance,which contains rich resistance gene resources.In this study,we used A.pumila as the research material,established biological research systems from the physiological and cellular level,molecular biology aspect,combined with RNA-seq technology to explore the mechanism of its adaptation to special habitats and analyze the value of resistance gene mining and breeding.

Mots clés : agricultural biological environment ;ephemeral plants ;A. pumila ;genetic improvement ;reference gene ;stress tolerance ;marginal land ;

Présentation (CNKI)

Page publiée le 16 février 2022