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Anatomy of Root and Stem of Sesame Under Water Logging

M.T. Islam
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh-2202, Bangladesh.

M. Khatoon
Crop Physiology Division, Bangladesh Institute of Nuclear Agriculture, Mymensingh-2202, Bangladesh.

Abstract/ Executive Summary:

Water 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, Rajshahi Khoyeri 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.

Keywords: Root, Stem anatomy, Sesame, Water logging

Location: BINA farm, Mymensingh

Start Date: 00-03-2017

End Date: 00-06-2017

Program Area: Variety and Species

Commodity: Sesame

Objectives:

The objective of the study was to find out or to identity the water logging tolerant genotypes of Sesame

Methodology:

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. The sesame land races were collected from different agro-ecological zones of Bangladesh. The objective of the study was to find out the water logging tolerant genotypes. Four water logging treatments viz. control and water logging periods of 24, 48 and 72 hours were imposed at flowering stage of the sesame genotypes. Each pot contained 8 kg soil collected from BINA farm. Urea, TSP, MP and Gypsum were applied 125, 150, 50 and 110 kg ha^-1, respectively. Half of urea and all other fertilizers were mixed with pot soils and remaining urea was applied at 30 days after sowing. After seedling establishment one seedling was allowed to grow in each pot. The experiment was laid out in completely randomized design with three replications. Anatomical features of both root and stem of all the sesame genotypes under water logging and controlled condition were efficiently observed by sectioning and finally by using Stereo Microscope having fixed slide. In water logging and controlled condition, anatomy of root and stem of a relatively tolerant cultivar RajshahiKhoyeri was shown and described in details.

Source of Information: Int. J. Expt. Agric. 10(2):12-15 (July 2020)

Article Link (Online Journal): http://ggfjournals.com/e-journals

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Root and stem anatomy of all the sesame genotypes were severely affected by 72 hours water logging. Rajshahi Khoyeri was less affected by 72 hours water logging, however, its epidermis, hypodermis and vascular bundle were partially damaged and showed some tolerance.

Knowledge Management: Journal