Effect of Seed Priming with Zinc on Seed Germination Characteristics, and Morphological Characters, and Mineral Content of Rice Tissues of Hashemi Rice Cultivar

Document Type : Research Paper

Authors

1 Assistant Professor of rice research institute of Iran

2 Associate Professor of Rice Research Institute of Iran, Agricultural Research, Education and Extension Organization, Rasht, Iran

3 1Assistant Professor of Rice Research Institute of Iran, Agricultural Research, Education and Extension Organization, Rasht, Iran

4 Research Assistant of Rice Research Institute of Iran, Agricultural Research, Education and Extension Organization, Rasht, Iran.

Abstract

Nutripriming of rice seeds with micronutrient (Zn) is considered to have the potential of optimizing Zn application, faster germination, uniform seedlings’ growth, better establishment of transplanted rice seedlings. The current experiments were designed and conducted to explore the effects of rice seeds nutripriming of with micronutrient (Zn) on macro and micronutrient content of primed seeds, morphological characteristics of rice seedlings and uptake of macro and micronutrients (N, P, K, Zn) for Hashemi rice cultivar through two laboratory and open-air pot experiments during 2021 at rice research institute of Iran. The highest increase in seed germination vigor index (2.9 times) ad reduction in germination dynamics or three germination fractions (t 10, t 50, and t 90) compared to control were recorded at nutripriming with zinc sulfate (5g. L-1) for 12 hours by about 2.28, 2.49, and 2.47 times, respectively. The maximum increase in Zn content of rice seeds (17.5 times) were observed at nutripriming with zinc sulfate (5g.L-1) for 24 hours compared to the control. Also, the highest positive, significant increase in the length of coleoptile and radicle by seed nutripriming with zinc sulfate (5g.L-1) for 6 hours compared to the control by about 25.87 and 18.67%, respectively. The maximum significant and positive increase in root wet and dry weight of rice seedlings were found at about 24.36, 20.00, 38.23, and 38% compared to the control through nutripriming of seeds with zinc sulfate (5g.L-1) for 6 hours in soils with Zn deficiency and sufficiency, respectively. The highest significant and effect on Zn content of shoot and root of rice seedlings were observed about 2.71, 2.91, 2.27, and 2.51 compared to the control through nutripriming of seeds with zinc sulfate (5g.L-1) for 6 hours in soils with Zn deficiency and sufficiency, respectively. Nutripriming of rice seeds with zinc sulfate (5g.L-1) solution for 6 hours could be an alternative solution for traditional methods of macro and micronutrients application (soil and foliar) by farmers in seed nursery.

Keywords

Main Subjects

Effect of Seed Priming with Zinc on Seed Germination Characteristics and Morphological Characters and Mineral Content of rice tissues of Hashemi Rice Cultivar

EXTENDED ABSTRACT

Introduction:

Nutripriming of rice seeds with micronutrient (Zn) is considered to have the potential of optimizing Zn application, faster germination, and uniform seedlings’ growth, better establishment of transplanted seedlings, higher grain yield, and nutritional quality.

 

Objectives:

The current experiments were designed and conducted to explore the effects of rice seeds nutripriming of with micronutrient (Zn) on macro and micronutrient content of primed seeds, morphological characteristics of rice seedlings and uptake of macro and micronutrients (N, P, K, Zn) for rice cv. ‘Hashemi’.

 

Materials and Methods:

The current researches were carried out in three different experiments during 2021 rice growing season at the Rice Research Institute of Iran, Rasht, Iran. The first and the second experiment were done in laboratory conditions and the third experiment was done as a pot experiment based completely random design (CRD), CRD and randomized complete block (RCBD) design with three replications, respectively. The experimental factors of the two first experiments were: nutripriming with zinc sulfate (5g.L-1) on 6, 12, and 24 hours, and control. For the third experiment the soil types at two levels (less and more than Zn critical level (2 mgkg-1) were added to previous factors. The measured characters were Zn, N, P, K content of seeds and diffrenet parts of rice seedlings, length of root and shoot, root and shoot wet and dry weights.

 

Results:

The highest increase in seed germination vigor index (2.9 times) ad reduction in germination dynamics or three germination fractions (t 10, t 50, and t 90) were recorded at nutripriming with zinc sulfate (5g. L-1) for 12 hours compared to the control by about 2.28, 2.49, and 2.47 times, respectively. The maximum increase in Zn content of rice seeds (17.5 times) were observed at nutripriming with zinc sulfate (5g.L-1) for 24 hours compared to the control. Also, the highest positive and significant increase in the root and shoot length recorded in seed nutripriming with zinc sulfate (5g.L-1) for 6 hours compared to the control by about 25.87 and 18.67%, respectively. The maximum significant and positive increase in root wet and dry weights of rice seedlings were found at about 24.36, 20.00, 38.23, and 38% compared to the control through nutripriming of seeds with zinc sulfate (5g.L-1) for 6 hours in both soils with and without Zn deficiency, respectively. The highest significant effect on Zn content of shoot and root of rice seedlings were observed about 2.71, 2.91, 2.27, and 2.51 compared to the control through nutripriming of seeds with zinc sulfate (5g.L-1) for 6 hours in soils with Zn deficiency and sufficiency, respectively.

 

Conclusion:

Nutripriming of rice seeds with zinc sulfate (5g.L-1) solution for 6 hours is an easy, quick and effective solution to remediate rice plant Zn requirment, improve seedlings quality and crop stablishment.

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Iranian Journal of Soil and Water Research
Volume 54, Issue 6
September 2023
Pages 895-914

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