The enhancement of drought tolerance for pigeon pea inoculated by arbuscular mycorrhizae fungi
2011
Qiao, G., Guizhou Univ., Guiyang (China). Key Lab. of Agricultural Bioengineering | Wen, X.P., Guizhou Univ., Guiyang (China). Key Lab. of Agricultural Bioengineering | Yu, L.F., Guizhou Univ., Guiyang (China). School of Forestry Science | Ji, X.B., Guizhou Univ., Guiyang (China). Key Lab. of Agricultural Bioengineering
The aim of the present research was to investigate the effects of arbuscular mycorrhizae (AM) on the drought tolerance of pigeon pea, as well as to elucidate the physiological responses of AM-colonized seedlings to the water deficit. As subjected to drought stress, AM symbiosis (AMD) highly led to the positive effects on root system, plant height and stem diameter. AMD demonstrated a remarkably higher chlorophyll content, photosynthetic rate and stomatal conductance. The soluble sugar in AMD was significantly higher than that of the non-AM seedlings (NAMD), indicating the enhanced tolerance at least partially correlated with osmotic solute. Conversely, the proline (Pro) of AMD was lower, revealing the excessive Pro was not imperative for drought tolerance. After 30 days of drought stress, AMD contained less lipid peroxides than NAMD. AM fungi might substantially elevate the tolerance to drought of pigeon pea.
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