Mannitol Application Alleviates Boron Toxicity in Wheat Seedlings

作者：Coskun Yasemin^*; Olgunsoy Pinar; Karatas Nihal; Bulut Fatma; Yarar Firdevs

来源：Communications in Soil Science and Plant Analysis, 2014, 45(7): 944-952.

DOI：10.1080/00103624.2013.867054

• ICP-OES
• durum wheat
• bread wheat
• Boron toxicity
• mannitol

Boron (B) toxicity is a considerable mineral nutritional problem for crop production in arid and semi-arid regions worldwide. The effect of mannitol (M) in wheat seedlings that are tolerant and sensitive to excessive B was studied to reduce B toxicity symptoms. Plants were grown in a peat with different concentrations of boric acid (0, 30, 45, 60 mg kg(-1)) and treated additionally with M (0, 1, 5, 10 g kg(-1)). Seedlings grown for 8 weeks were harvested for root length, shoot length, and dry-weight measurements and analyzed for B content of leaves. Compared with control groups (no boric acid treatment), B toxicity caused reductions in root length, shoot length, and dry weight of both wheat cultivars. Significant increases on growth parameters were observed under B treatments, the greatest with 1 g kg(-1) M application in a tolerant bread cultivar. On the other hand, 10 g kg(-1) M application under 60 mg kg(-1) B treatment gave also good results on root length in a sensitive durum cultivar. Significant decreases in leaf B content were observed under B treatments with all M applications in both wheat cultivars, the greatest with 5 g kg(-1) M application. The results suggest that M applications may have a possible role in overcoming in B toxicity in wheat grown in the field.

• 出版日期2014-4-12