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Effects of Soil Flooding on Roots, Photosynthesis and Water Relations in Mungbean (vigna Radiata (l.) Wilczek)

M RAFIQUL ISLAM
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh

ABDUL HAMID
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh

QUZI ABDUL KHALIQ
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh

M MOYNUL HAQUE
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh

JALAL UDDIN AHMED
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh

M ABDUL KARIM
Department of Agronomy, Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur-1706, Bangladesh

Abstract/ Executive Summary:

Two mungbean (Vigna radiata (L.) Wilczek) genotypes (GK48 - flood tolerant and BARImug5- flood susceptible) were flooded at vegetative and flowering stages for 5 and 10 days, respectively. Flooding damaged the lateral roots of GK48 wholly, but it recovered quickly by forming numerous adventitious roots. Flooding significantly reduced photosynthetic rate (Pn) and leaf water potential (Ψl) in both the genotypes but GK48 tended to regain Pn and Ψl during postflooding phase. It appeared that GK48 withstands flooding to a great extent.

Keywords: Water potential, Mungbean, Root growth, Photosynthesis

Location: Bangabandhu Sheikh Mujibur Rahman Agricultural University, Gazipur

Start Date: 00-08-2001

End Date: 00-10-2001

Program Area: Variety and Species

Commodity: Mungbean

Objectives:

To determine the effect of soil flooding on roots, photosynthesis and water relations on mungbean.

Methodology:

The experiment was conducted at Bangabandhu Sheikh Mujibur Rahman Agricultural University, Bangladesh during August-October, 2001. Two mungbean genotypes viz. GK48 (flood-tolerant) and BARImug5 (flood susceptible) were flooded for 5 and 10 days for both vegetative and flowering stages. Flooding depth was maintained 2.5 cm above the soil surface. Treatments were arranged in a RCB design with six single plant replicates. At each time of flooding and recovery, both flooded and non-flooded plants were sampled to measure the growth and photosynthetic rate (Pn) using a portable photosynthesis measuring system. Water potential (Ψl) was measured following the procedure described by Saneoka et al. (1995).

Source of Information: Bangladesh J. Bot. 39(2): 241-243, 2010 (December)

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

Flooding damaged the lateral roots of GK48 wholly, but it recovered quickly by forming numerous adventitious roots. Flooding significantly reduced photosynthetic rate (Pn) and leaf water potential (Ψl) in both the genotypes but GK48 tended to regain Pn and Ψl during postflooding phase. It appeared that GK48 withstands flooding to a great extent.

Knowledge Management: Journal