Effects of Flooding and Endogenous Hormone on the Formation of Knee Roots in .

is a typical tree species with high flood tolerance, and it can generate knee roots in the wetlands. This study investigated the number and size of knee roots and the soil flooding conditions. Furthermore, we also measured physiology, biochemical responses, and the anatomical structure of knee roots and underground roots at different developmental stages.

Aeration increases soil bacterial diversity and nutrient transformation under mulching-induced hypoxic conditions.

Soil oxygen (O) deficiency induced by organic mulching is easy to overlook. Aeration has been shown to potentially alleviate soil hypoxia stress. However, the responses of soil bacterial communities to such mulching-induced hypoxic conditions and aeration remain elusive.

Nutrient distribution indicated whole-tree harvesting as a possible factor restricting the sustainable productivity of a poplar plantation system in China.

We evaluated the biomass and contents of five major macronutrients (N, P, K, Ca and Mg) in 10-year-old poplar trees (Populus deltoids Bartr. cv. "Lux"), and determined their nutrient use efficiencies (NUEs) at Zhoushan Forestry Farm (32°20' N, 119°40' E), Jiangsu province, in eastern China.

Overexpression of Enhances Salt Tolerance in Transgenic Poplars.

Protein kinases are major signal transduction factors that have a central role in mediating acclimation to environmental changes in eukaryotic organisms. In this study, we cloned and identified three salt overly sensitive 2 () genes in the woody plant , designated as , , and , which were transformed into hybrid poplar clone T89 (×  Michx clone T89) mediated by . Southern and northern blot analyses verified that the three genes integrated into the plant genome, and were expressed at a stable transcription level.