This review seeks to examine the extreme response of isolated somatic plant cells of apical meristematic tissues of mature conifer trees towards specific stress conditions in vitro resulting in somatic embryo- genesis...This review seeks to examine the extreme response of isolated somatic plant cells of apical meristematic tissues of mature conifer trees towards specific stress conditions in vitro resulting in somatic embryo- genesis. Signal molecules regulating embryo development have been described in angiosperms, but very little is known about somatic rejuve- nation in conifers. Recent studies on cloning of mature conifers provide new perspectives on signal molecules on cellular dedifferentiation into the embryogenic pathway. Our recent studies show that signal molecules such as butenolide, calcium ions, salicylic acid, antioxidants, amino acids triacontanol and 24-epibrassinolide all play an important role in the con- version of somatic cells into an embryogenic pathway in many recalcitrant pines. This constitutes a major breakthrough in forest biotechnology with many practical applications in clonal forestry.展开更多
After analysis on the current situation of international forestry, this paper proposes that integration, coordination and sustainable development will be the general developing trend of forest in China, and commercial...After analysis on the current situation of international forestry, this paper proposes that integration, coordination and sustainable development will be the general developing trend of forest in China, and commercial forest, ecological forest and community forest should be organically combined with integrative development and sustainable development in rural areas. This paper focuses especially on clarifying the importance of community forest to the social development or rural areas, and emphasizes tha...展开更多
文摘This review seeks to examine the extreme response of isolated somatic plant cells of apical meristematic tissues of mature conifer trees towards specific stress conditions in vitro resulting in somatic embryo- genesis. Signal molecules regulating embryo development have been described in angiosperms, but very little is known about somatic rejuve- nation in conifers. Recent studies on cloning of mature conifers provide new perspectives on signal molecules on cellular dedifferentiation into the embryogenic pathway. Our recent studies show that signal molecules such as butenolide, calcium ions, salicylic acid, antioxidants, amino acids triacontanol and 24-epibrassinolide all play an important role in the con- version of somatic cells into an embryogenic pathway in many recalcitrant pines. This constitutes a major breakthrough in forest biotechnology with many practical applications in clonal forestry.
文摘After analysis on the current situation of international forestry, this paper proposes that integration, coordination and sustainable development will be the general developing trend of forest in China, and commercial forest, ecological forest and community forest should be organically combined with integrative development and sustainable development in rural areas. This paper focuses especially on clarifying the importance of community forest to the social development or rural areas, and emphasizes tha...
