Pivotal metabolic pathways related to water deficit tolerance and growth recovery of whole maize plant

摘要: Tolerance to water deficit as well growth recovery from by re-watering are two important and inseparable processes for maize survival. However, details of metabolic mechanisms unknown still need be filled. Leaf potential photosynthetic parameters three-leaf-stage seedlings inbred line Huangzao 4 under progressive were measured, metabolites the corresponding treatments identified subjected analyses hierarchical cluster, principal component self-organizing mapping. A total 142 polar metabolites, 127 in leaves 125 roots, identified, including 13 amino acids, 17 organic 8 sugars, 2 sugar alcohols, others, which 85 53 roots showed a significant change level deficit. Fifty-nine had re-watering, majority acids anmino acids. In conclusion, there is crosstalk metabolisms between tolerance with glycolysis, starch protein degradation pivotal pathways; changes maximize uptake whereas prevent loss increase water-use efficiency; depends on level-controlled balance networks; uses an emergency repair mechanism recovery. The results give informative clues address at level.