Green Global
Foundation Journal
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Papers
ANATOMY OF ROOT AND STEM OF SESAME UNDER WATER LOGGING (Pages : 12 - 15)
M.T. ISLAM AND M. KHATOONWater logging is an environmental factor that limits plant growth, reduces gas exchange between plant tissues and damages root and stem structures. A pot experiment was conducted with seven sesame genotypes viz. RajshahiKhoyeri, KistotilChapai, KathtilChapai, Gopalgonj MV-40, Gopalgong Black, KalotilGopalgong and LaltilGopalgonj at BINA farm, Mymensingh during March to June 2017. Four water logging treatments viz. Control, 24, 48 and 72 hours were imposed at flowering stage of the sesame genotypes. Tissue of root and shoot of sesame genotypes under water logging had a great damage compared to control. Root and stem anatomy of all the sesame genotypes were severely affected by 72 hours water logging, the epidermis, hypodermis and vascular bundle were damaged and prominent hallow was found in stem due to damaged tissue. However, RajshahiKhoyeri was less affected, water logging at 72 hours partially damaged its epidermis, hypodermis and vascular bundle and adventitious roots were formed to help storage and exchange of gases within stressed plants to maintain a hypoxia tolerance pathway for survival. Download