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Germination and Seedling Growth of Cauliflower as Affected by Salinity (2017 – 2018)

M.D. Hossain
Horticulture Research Centre, BARI, Joydebpur, Gazipur Bangladesh

Ferdose Islam
Horticulture Research Centre, BARI, Joydebpur, Gazipur Bangladesh

Mohd. Moniruzzaman.
Horticulture Research Centre, BARI, Joydebpur, Gazipur Bangladesh

Abstract/ Executive Summary:

An experiment was conducted at the shade house of Olericulture Division, Horticulture Research Center, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur during December, 2017 to investigate the effect of salinity on germination and early seedling growth stage of cauliflower. Nine cauliflower varieties viz; BARI Fuikopi-1 (C-01), BARI Fulkopi-2 (C-02), Cauliflower Poosi (OP) (C-03), Cauliflower F₁ Hybrid (Fresh Marker) (C-04), No.671 hybrid 65 days cauliflower (C-05), Cauliflower F₁ Hybrid (LOPA) (C-06), Hybrid Fulkopi (Snow Box) (C-07), Cauliflower F₁ Hybrid (Candid Charm) (C-08) and Cauliflower F₁ Hybrid (Shira Giku) (C-09) were included in this study. Four levels of salinity viz., 0 (control), 4, 8 and 12 dS/m were imposed at the very beginning of germination and continue up to 20 days. The results revealed that salt stress reduced the germination percentage (GP) and speed of germination (SG) in cauliflower seeds. Under different stress conditions, C-01, C-05 and C-09 gave the higher GP and C-01, C-02 and C-09 gave the higher SG as compared to other verities. The length of shoot and root and fresh and dry weight of seedlings at 20 DAS were also decreased as the concentration of salinity increased. The longer shoot and root were recorded from C-01, C-02, C-07 and C-09 under different salinity levels. In case of fresh and dry weight of seedlings, C-04, C-07 and C-09 showed the overall higher values. Increasing salinity caused gradual decrease in seedling vigor index (SVI) and seedlings tolerance index (STI), while percentage of shoot and root toxicity (ST% and RT%, respectively) and relative seedlings water content (RSWC) were increased with increasing salinity. The higher SVI were recorded from C-01, C-07 and C-09 while higher STI were recorded from C-01, C-04 and C-09 under different salinity levels. At different salinity levels, the ST(%) were minimum in C-01, C-07 and C-09 and RT(%) in C-01, C-04 and C-09.

Keywords: Germination, Tolerance, Vigor, Cauliflower, salinity

Location: Olericulture Division, Horticulture Research Center, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur

Start Date: 00-00-2017

End Date: 00-00-2018

Program Area: Variety and Species

Commodity: Cauliflower, Soil salinity

Objectives:

To investigate the effects of different salt concentrations on the germination, tolerance, vigor, and seedling relative water content of available cauliflower varieties in Bangladesh.

Methodology:

The experiment was conducted in December, 2017 at the Olericulture Division, Horticulture Research Center, Bangladesh Agricultural Research Institute, Joydebpur, Gazipur. The experiment was arranged in factorial and laid out in completely randomized design with three replications. Factors included were nine cauliflower varieties and salinity in four levels (0, 4, 8 and 12 dS/m). Cauliflower varieties were; BARI Fuikopi-1 (C-01), BARI Fulkopi-2 (C-02), Cauliflower Poosi (OP) (C-03), Cauliflower F₁ Hybrid (Fresh Marker) (C-04), No.671 hybrid 65 days cauliflower (C-05), Cauliflower F₁ Hybrid (LOPA) (C-06), Hybrid Fulkopi (Snow Box) (C-07), Cauliflower F₁ Hybrid (Candid Charm) (C-08) and Cauliflower F₁ Hybrid (Shira Giku) (C-09). 0.5 L plastic pots were used as germination media. At first pots were filled with saline water incorporated with half-strength Hogland Nutrient Solution. The caps of the pots were reversely set on the pot, a small piece of Markin cloth was set on the cap and four corners of the cloth were connected to the saline water. Seeds were placed on the water soaked cloth fitted on the cap. For each treatment, 50 seed were used for germination and early vegetative growth. The pots were kept under a shade house with normal temperature. Germination was continued for 12 days and germinated seeds were counted daily. After 20 days of sowing, root and shoot lengths of seedling were measured using a centimeter scale. Dry weights of seedlings were measured after oven-drying for 72 h at 60^°C. Collected data were statistically analyzed using XLSTAT 2015 software.

Source of Information: Annual Research Report 2017 – 2018, Horticulture Research Centre, BARI, Joydebpur, Gazipur Bangladesh

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Based on germination data and different seedling growth parameters, it can be stated that BARI Fuikopi-1 (C-01), No.671 hybrid 65 days cauliflower (C-05), Hybrid Fulkopi (Snow Box) (C-07) and Cauliflower F₁ Hybrid (Shira Giku) (C-09) had salt tolerant potential up to 8 dS/m salinity stress while BARI Fuikopi-1 (C-01) and Cauliflower F₁Hybrid (Shira Giku) (C-09) can tolerate up to 12 dS/m salinity stress and the rest of the genotypes are salt susceptible. However, the experiment may be repeated for further confirmation.

Knowledge Management: Report/Proceedings