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Seed Quality Deterioration Due to Temporal Variation of Biotic and Abiotic Factors in Cucumber

A.B.M. KHALDUN
Scientific Officer, Plant Breeding Division , BARI, Joydebpur, Gazipur-1701, Bangladesh.

MD. EHSANUL HAQUE
Scientific Officer, Plant Breeding Division , BARI, Joydebpur, Gazipur-1701,Bangladesh.

Abstract/ Executive Summary:

Cucumber seeds were taken to assess the effect of temporal variation on the seed quality. Seeds were stored in three types of containers, such as metal (tin), polythene bag, and cloth bag. The containers were stored a t room temperature and ambient relative humidity a round three month s. Seed quality factors viz., moisture content, germination percentage, vigor index , percentage of abnormal seedling, fresh seed, dead seed, hard seed, root-shoot ratio and amount of dry matter were recorded every 15 days interval. The initial moisture content of seed in tin, poly bag, and cloth bag were 10.66%, 10.13%, and 9.89%, respectively, but it was increased with increasing storage time after 60 days (11.08%, 10.67%, and 10.98%). The germination percentage was higher at 15 days after observation (DAO) for different containers like tin (90%), poly bag (86%), and cloth bag (85%) than after 60 DAO (86%, 84%, and 80%), respectively , on blotting paper substrate. The percentage of dead seed was increased from 2 to 10%, 5 to 12%, and 6 to 12% in tin container, poly bag, and cloth bag, respectively, from 15 DAO to 60 DAO.

Keywords: Seed quality, Cucumber, Temporal variation, Biotic, Abiotic factors.

Location: Bangabandhu Sheik Mujibur Rahman Agricultural University, Salna, Gazipur.

Start Date:

End Date:

Program Area: Seed Technology

Commodity: Cucumber

Objectives:

1. To identify the best storage container for maintaining quality of cucumber seed.

2.To know the effect of moisture on the germination percentage and weight of Cucumber seed.

3.To asses the vigority of cucumber seeds obtained from different containers.

Methodology:

The present investigation was carried out at the outreach center of Bangabandhu Sheik Mujibur Rahman Agricultural University, Salna, Gazipur. Experimental material was the cucumber (Cucumis sativus) seeds stored in three different containers. The containers were, Tin made unsealed container, Polythene bag and Cloth bag. The seeds were purchased from Siddique Bazar Seed Market, Dhaka. Seeds were stored at room temperature (RT) and relative humidity (RH) for 60 days. Initial moisture content of seeds was recorded as 10.66% (tin container), 10.13% (polythene bag), and 9.89% (cloth bag). For moisture content determination test, high constant temperature method was followed according to ISTA rules. The cucumber seeds of about 4-5 g was taken in metal container with lid which diameter was less than 8 em and was placed in oven under temperature of 133 ± 3°C for 1 hour to dry. One hundred seeds were placed in the moist blotting paper on each plastic tray and replicated four times in each trial of each treatment. The germinated seeds were taken as seedling where it was attained at 4 mm shoot length. The germination test was done according to the prescribed rules (ISTA, 1993). For the cucumber seed, 41 day after sowing was considered as the first counting day and 81 day was the final counting day though data were taken every day to assess the seedling evaluation like normal seedling, abnormal seedling, dead seed, fresh seed, hard seed, and vigority. The seeds were set in every 15 days. Vigor index was assessed by counting the first seedling count divided by the respective day and liking onward upto final counting day. Seedling length was calculated from combining the shoot and root length.

Source of Information: Bangladesh J. Agril. Res. 34(3): 457-463, September 2009

Article Link (Online Journal):

Funding Source:

Total Budget (Tk.) :

Achievement/Findings:

The initial moisture content of seed in tin, poly bag, and cloth bag were 10.66%, 10.13%, and 9.89%, respectively, but it was increased with increasing storage time after 60 days (11.08%, 10.67%, and 10.98%). The germination percentage was higher at 15 days after observation (DAO) for different containers like tin (90%), poly bag (86%), and cloth bag (85%) than after 60 DAO (86%, 84%, and 80%), respectively , on blotting paper substrate. The percentage of dead seed was increased from 2 to 10%, 5 to 12%, and 6 to 12% in tin container, poly bag, and cloth bag, respectively, from 15 DAO to 60 DAO. The vigor indexes of seedling were 14.58, 12.85, and 10.92 at 15 DAO in tin , poly bag, and cloth bag, respectively, which attained at 10.39, 10.26, and 10.08 at 60 DAO, respectively. The length of seedling was 25.85 em, 25.15 em, and 24.30 em at 60 DAO in tin, poly bag, a nd cloth bag, respectively. Shoot-root ratio was found highest in tin container at 15 DAO (0.95) and lowest in cloth bag (0.70) at 60 DAO. Key Words: Seed quality, cucumber, temporal variation, biotic and abiotic factors.

Knowledge Management: Journal