|
|
Xu C, Wu XQ. 2009. Drought responses and related endogenous polyamine changes in mycorrhizaed Pinus massoniana. Acta Botanica Boreali-Occidentalia Sinica 29: 296-301. Pinus massoniana inoculated by four different ectomycorrhizal fungi and mixed fungi were used as test materials. Following a drought stress in the greenhouse, the wilting rate, wilting degree and relative soil content were studied on P. massoniana. The results showed that ectomycorrhiza enhanced the relative soil content and reduced the wilting rate and wilting degree significantly; the Spm and the total polyamine content are all higher and relatively more stable in the inoculated plants than those in the control plants, but no significant change in Spd content either in the inoculated or in the control plants was observed. In contrast, the Put content in La mycorrhiza and control plants are all relatively high although with large fluctuations. Therefore, it is concluded that ectomycorrhization raised the level of Spm and degradability of Put in P. massoniana and altered the ratio of different polyamines and then enhanced the drought resistance of mycorrhizal pines.
|