Natural surgical risks and age distribution in Chinese patients with Peutz-Jeghers syndrome: Real-world research based on a web survey.

Background: Complications arising from the polyps in Peutz-Jeghers syndrome (PJS) have historically been addressed through surgical treatment. Enteroscopic polypectomy is hypothesized to reduce the risk of surgery in PJS. However, the optimal timing for polyp screening and preventive intervention using enteroscopic polypectomy remains uncertain.

[Effects of combined drought and salinity stress on germination and physiological characteristics of maize (Zea mays).].

In this study, 15% PEG, 100 mmol·L NaCl and PEG-NaCl mixed solution were employed to respectively simulate the drought (D), salinity (S) and the combined stress (D+S), and effects of these three stresses on the seed germination and the physiological characteristics of seedlings were investigated. The results showed that seed germination, seedling growth and biomass accumulation were significantly inhibited by these three stresses, and the impact of stress ranked as D>D+S>S. The content of reactive oxygen species like HO and O, as well as malondialdehyde (MDA) and membrane permeability were increased under these stresses, meanwhile, proline (Pro), soluble sugar and soluble proteins contents were significantly improved, which were higher in seedlings than in roots with a rank of D>D+S>S.