关键词: 低磷信号转导;形态适应性;生理生化适应性;代谢适应性

Abstract:

Phosphorus is one of essential macronutrients required for plant growth and development, but the soluble inorganic phosphate is deficient in 40%~60% of the worlds arable lands. Therefore the plant growth and crop yield are limited. During the long evolution process, plants have developed many strategies to response to Pi deficiency under the synergies between ‘early’ genes and ‘late’ genes. The ‘early’ genes respond rapidly and are involved in sensing Pi deficiency and transducing information and the ‘late’ genes regarding the morphological, physiological or metabolic alternations can improve the Pi acquisition, transportation and cyclic utilization efficiency. Aiming at further understanding how plants response and adapt to Pi deficiency and develop new crops with high tolerance to Pi deficiency, this paper expounds the research progress on plant tolerance to phosphorus deficiency from early signaling events, and late morphological, physiological and metabolism adaptations mechanism, so as to provide scientific basis for developing crop varieties tolerant to Pi deficiency.

Key words: signaling transduction, morphological adaptation, physiological and biochemical adaptation, metabolism adaptation