Exogenous nitric oxide alleviates iron-deficiency chlorosis in peanut growing on calcareous soil
Zhang, X.W., Shandong Agricultural Univ., Tai'an (China). Coll. of Resources and Environment | Dong, Y.J., Shandong Agricultural Univ., Tai'an (China). Coll. of Resources and Environment | Qiu, X.K., Shandong Agricultural Univ., Tai'an (China). Coll. of Resources and Environment | Hu, G.Q., Shandong Agricultural Univ., Tai'an (China). Coll. of Resources and Environment | Wang, Y.H., Shandong Agricultural Univ., Tai'an (China). Coll. of Resources and Environment | Wang, Q.H., Shandong Agricultural Univ., Tai'an (China). Coll. of Resources and Environment
Sodium nitroprusside (SNP), a nitric oxide (NO) donor, was added into controlled release fertilizer (CRF) or sprayed on leaves to supply NO on iron deficiency stress in peanut plants growing on calcareous soils. Iron deficiency reduced plant growth and chlorophyll content. NO improved plant growth and alleviated leaf interveinal chlorosis, and increased the activity of root FeIII reductase and the concentration of available Fe in cultured soil, suggesting that NO action could be related to Fe availability to the plant. The actual photochemical efficiency and photochemical maximum efficiency of PSII were increased, and minimum fluorescence yield was decreased under NO-treated condition, which supported the protective effect of NO on photosystem II in peanut leaves. NO increased the activities of antioxidant enzymes, and reduced malondialdehyde accumulation. These results suggest that exogenous NO could alleviate Fe deficiency induced chlorosis of peanut plants growing on calcareous soil.
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