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Screening of Mungbean Germplasm Under Nacl Salinity (2016--2017)

A. K. M. M. ALAM
Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

Abstract/ Executive Summary:

An experiment was conducted to study the effect of salinity on germination, root and shoot growth and nodulation of Mungbean (Vigna radiata L.) at four salinity levels e.g. 0, 1, 2 and 3 ds/m of NaCl concentrations. Salinity affects imbibition, germination and root elongation. The highest germination % was observed in the control treatment of all the varieties. Root growth was significantly reduced with higher NaCl concentrations, and BARI Mung 6 showed better performances than other varieties. All the varieties showed similar performances at higher NaCl concentration considering yield contributing character.

Keywords: Nitrogen fixation, Salinity, Mungbean

Location: Laboratory of PRSS, BARI, Gazipur

Start Date: 00-00-2017

End Date: 00-00-2017

Program Area: Variety and Species

Commodity: Mungbean, Soil salinity

Objectives:

Considering the importance of nitrogen fixation and the effect of salinity on nitrogen fixation the present study was therefore conducted to study the effects of salinity on germination, growth of mungbean varieties.

Methodology:

The experiment was conducted in 2017 at the laboratory of PRSS, BARI, Gazipur. Seed of three Mungbean varieties (BARI Mung 4, BARI Mung 5 and BARI Mung 6) were used. Seeds were sown in Petridis with blotting paper soaked with different concentrations of salt solution. Four different concentration 0, 1, 2 and 3 ds/M conc. salt solution was used. For this purpose, the salt solution different amount of NaCl was dissolved in 1 L water as described by R Munns and R A Richards (1998). There was a sufficient amount of solution used to soak each petridis. Each was watered as and when required and care was taken not to leach the salt by excess watering. There were 3 replications for each treatment and the experiment was arranged in a complete randomized design. Electrical conductivity (ECe) of different treatments was measured by using a conductivity meter (Field scout soil and water EC meter). Germination percentage, root & shoot length were recorded from the treatment of range salinity (0, 1, 2, and 3ds/M NaCl conc.). Data on root and shoot development was recorded after three days of seed placement on petridish.

Source of Information: Annual Research Report 2016-2017, Pulses Research Centre, RARS, BARI, Ishurdi, Pabna

Article Link (Online Journal):

Funding Source:

1.

Budget:

Total Budget (Tk.) :

Achievement/Findings:

The response of Mungbean at different dates showed remarkable variation among the varieties. Among the varieties, BARI Mung 5 did not show any remarkable variation among the different dates. BARI Mung 4 and BARI Mung 6 showed significant differences on different dates. The highest germination (%) was observed at the control treatment and was followed by 0, 1, 2 and 3 ds/M. Higher conc inhibits germination of Mungbean. It was reported germination significantly reduced when electrical conductivity increased in the case of cowpea. The effect of NaCl concentration on root growth of Mungbean varieties at different dates. In the case of BARI Mung 4, at 4 days and 5 days after germination root growth showed significant variation. The highest root growth was found at the control treatment which was followed by the higher concentration of NaCl treatment. Considering the root growth of three varieties BARI Mung 6 was found better than the other two varieties. It was reported that root growth was more sensitive to an increase in salt stress in both cowpea and Mungbean. But in shoot development, BARI Mung 4 performed better than other varieties. All the varieties showed significant differences at a later stage for shoot development. The electrical conductivities also measured in petdrishis and were 1.05, 2.02, and 3.20 dS m-1 respectively after five days of placement. Apart from this salinity stress increasing salinity is also accompanied by significant reductions in shoot weight, plant height and root length.

Knowledge Management: Report/Proceedings