Differential proteomic analysis reveals the mechanism of Musa paradisiaca responding to salt stress.

Salinity is one of the most important abiotic stresses, which affects the yield and quality of banana (Musa paradisiaca). To understand the salinity tolerance mechanisms of banana, the iTRAQ technique is employed to reveal the proteomic response of Brazil banana under different durations of 60 mmol/L NaCl stress. We have identified 77 DEPs and classified them into nine functional categories, compared with control (0 mmol/L NaCl treatment). The four major categories involve protein synthesis and degradation, photosynthesis, defense response, and energy and carbohydrate metabolism. The results indicate that photosynthesis, protein synthesis and degradation, lipid metabolism and secondary metabolism are promoted to limit damage to a repairable level. The accumulation of ROS under salt stress is harmful to cells and causes up-regulation of antioxidant systems. Furthermore, to cope with cells injured by salt stress, PCD is used to remove the damaged. Additionally, the cytoskeleton can play an important role in maintaining cellular and redox homeostasis. Different categories of functional proteins by changing the abundance ratio shows that plants have different mechanisms of response to salinity. Conclusively, Function of the observed changes in protein expression objective is to establish a new metabolic process of steady-state balance. To my knowledge, this is the first report that investigates responses of M. paradisiaca to salt stress by proteomic analysis.

Viciamingyueshanensis (Fabeae, Papilionoideae, Fabaceae), a new species from western Jiangxi, China.

Viciamingyueshanensis, a new species from the Mingyue Mountain Region of western Jiangxi, China, is described and illustrated. It is a perennial climbing liana that always links to riparian woods. A morphological comparison indicated that the new species is closely similar to Viciataipaica K. T. Fu and Viciadichroantha Diels; however, it differs from the other two species by several salient characters, such as plant indumentum, stipule shape, corolla colour, bractlet shape and calyx shape. Photographs, a preliminary conservation assessment, table of morphological characters and distribution map comparing this new species to two morphologically-similar species are also provided.