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Germination and Seedling Growth of Indigenous Aman Rice Under Salt Stress

D. Das
Agrotechnology Discipline, Khulna University, Khulna, Bangladesh

M. A. Ali
Agrotechnology Discipline, Khulna University, Khulna, Bangladesh

T. A. Sarkar
Agrotechnology Discipline, Khulna University, Khulna, Bangladesh

M. Y. Ali
Agrotechnology Discipline, Khulna University, Khulna, Bangladesh

Abstract/ Executive Summary:

The experiment was conducted at the Agronomy Laboratory of Agrotechnology Discipline, Khulna University, Khulna to determine the effect of salt stress on germination and seedling growth of indigenous Aman rice varieties during June, 2015 to December, 2015. The salt tolerant landraces will be used as genetic resource for variety development program in future. The factorial experiment consists of two factors such as ten indigenous Aman rice varieties and four levels of salt solutions viz EC (dS m−1) of 5, 10 and 15 with control (distilled water). The experiment was laid out in Completely Randomized Design (CRD) with three replications. The interaction effects between variety and salinity on germination and seedling growth parameters of indigenous Aman rice varieties were varied significantly. It was found that germination capacity, energy, speed, seedling vigor index, root length and shoot length of rice were decreased gradually with increasing salinity. The germination energy and germination speed of most varieties were drastically reduced at 10 dS m⁻¹ or higher salinity levels. The germination capacity of Hatibazor, Boushohagi, Shadagotal and Moinamoti were recorded 97.66 %, 99.33%, 98.0 % and 97.33%, respectively at 15 dS m⁻¹ water salinity in laboratory condition. The results revealed that the indigenous Aman rice varieties named Boushohagi, Shadagotal, Hatibazor, Moinamoti, Motha were performed better over other varieties considering of germination and seedling growth parameters.

Keywords: Germination capacity, Seedling growth, Seedling vigor index, Rice

Location: Agronomy Laboratory of Agrotechnology Discipline, Khulna University, Khulna

Start Date: 00-06-2015

End Date: 00-12-2015

Program Area: Crop-Soil-Water Management

Commodity: Rice

Objectives:

The research was undertaken to determine the effect of salt stress on germination and seedling growth of indigenous Aman rice varieties

Methodology:

The experiment was conducted at Agronomy Laboratory of Agrotechnology Discipline, Khulna University, Bangladesh during June 2015 to October 2015. This factorial experiment consists of two factors such as four different concentrations of salt solutions (0, 5, 10, 15 dS m⁻¹) and ten indigenous Aman rice varieties (V1 = Gopalvog, V2 = Hatibazor, V3 = Lalmota, V4 = Hamai, V5 = Khejurchari, V6 = Barjomuri, V7 = Boushohagi, V8 = Shadagotal, V9 = Moinamoti, V10 = Motha. The experiment was carried out in a Completely Randomized Design (CRD) with three replications. Salt solutions of definite level of salinity were prepared by using required amounts of salt (NaCl) dissolving in distilled water. The germination tests were conducted at petridishes using distilled water and salt solutions of different concentrations. The recorded data were analyzed statistically with the help of computer package program MSTAT-C and the mean differences were adjudged by Duncan’s New Multiple Ranges Test (Gomez and Gomez, 1984). Germination energy: Percentage of seeds germinating 3 days after sowing (Bam et al., 2006.) Germination capacity: Percentage of seeds germinating 7 days after sowing (Bam et al., 2006.) Speed of germination: According to Krishnaswamy & Seshu (1990) speed of germination was measured. Seedling vigor index (SVI): According to Abdul and Anderson (1973) seedling vigor index was measured by the following equation: Seedling vigor index = (average shoot length + average root length) × germination percentage Root and shoot length: Five seedlings were sampled randomly from each petridish to measure root and shoot length.

Source of Information: J Bangladesh Agril Univ 15(2): 182–187, 2017

Article Link (Online Journal):

Funding Source:

Budget:

Total Budget (Tk.) :

Achievement/Findings:

Germination and seedling growth of indigenous Aman rice were significantly affected by salt stress. Germination percentage (%), germination energy (%), germination capacity (%), germination speed (%), root length (cm), shoot length (cm), seedling vigor index were declined gradually with increasing salinity. The variable response was found by the interaction between varieties to salinity. The variety named Boushohagi, Shadagotal, Hatibazor, Moinamoti, Motha were might be considered as superior to others variety based on their germination and seedling growth performance.

Knowledge Management: Journal