Aiming at the hot issues of plant systematics in the world, the tropical and subtropical forest plants in China, such as Apocynaceae, Araliaceae, Loganiaceae, Annonaceae, Euphorbiaceae, Platanus and Ericaceae, were developed by applying the techniques of plant anatomy and molecular biology.

1. Study on service and protection ecology of tropical and subtropical forest ecosystem.

Based on the actual situation of forestry ecological construction in southern China, the research on forest plant ecology, forest ecosystem service function and its mechanism, natural forest, artificial forest and rare plant protection ecology was carried out. This direction focuses on the following aspects:

(1) Study on population dynamics and genetic diversity of rare plants in tropical and subtropical regions;

(2) Study on biodiversity mechanism of zonal forest ecosystem;

(3) Study on carbon storage and carbon flux of forest ecosystem;

(4) The function and mechanism of forest plants in environmental restoration;

(5) Nutrient cycle of forest ecosystem.

3. Study on the structure and reproductive biology of important forestry economic plants.

Taking tropical and subtropical plants as the main research object, closely combining with the individual development problems in forestry production, the structure and reproductive biology of important economic plants were studied by using modern electron microscopic analysis methods. The main research directions include:

(1) Secretory structure of conifers and formation of secondary metabolites;

(2) Study on the characteristics of megasporogenesis and development of conifers;

(3) Study on the structural development of medicinal parts and the dynamic distribution and accumulation of effective components of important southern medicines.

4. Study on stress physiology and stress resistance genetic engineering of forest and grass.

Taking tropical and subtropical forest and grass plants as the main research object, closely combining with the practical application problems of grass in forestry production, forest soil and water conservation and urban and rural greening, using modern biotechnology and plant physiological and biochemical methods, the stress physiology and stress resistance genetic engineering of forest and grass were studied. The main research direction is:

(1) Studies on the physiological and molecular mechanisms of drought and cold resistance of grasses;

(2) Biotechnology and stress resistance breeding of Gramineae plants;

(3) Study on the molecular mechanism of organic acid metabolism and regulation in plants.

Study on Genetic Improvement of Fast-growing Tree Species

According to the needs of commercial forest growth, the excellent germplasm resources at home and abroad were widely collected. On the basis of establishing seed orchards and asexual propagation of superior trees, the genetic characteristics and gene location of fast-growing trees were studied by using modern molecular biology technology, which provided scientific basis for genetic improvement of fast-growing trees. The main research direction is:

(1) Multi-generation recurrent selection and genetic diversity of pine.

(2) Study on the molecular biological mechanism of forest character improvement.

(3) Study on lignocellulose biomass genomics and bioenergy.