Induction on Seed Germination and Seeedling Performances against Sunflower (Helainthus annuus L.) and Castor bean (Ricinus communis L.) as influenced by Different Water Stress Treatments

Sawatdikarn Sanit

International Journal of Sciences, 2021, vol. 10, issue 02, 41-50

Abstract: The objective of this study was to studied of the effects of water stress treatments on inhibition of seed germination and seedling growth in sunflower (Helainthus annuus L.) and castor bean (Ricinus communis L.). The experimental design was 3x5 Factorial in CRD (Completely randomized design) with four replications. Factor A as levels of seed qualities (sunflower and castor bean) divided into three treatments; 1) high quality seed 2) medium quality seed and 3) low quality seed as well as Factor B as the water stress treatments (WST) consisted of five treatments after watered at the first planting; T1 the watered treatment for every day (control treatment) T2 the watered interval for one day T3 the watered interval for two days T4 the watered interval for three days and T5 the watered interval for four days. Seed germination, speed of germination index, shoot length and seedling dry weight were tested. The results showed that the increase of water stress treatments resulted in the increase of inhibition of seed germination and seedling growth in two selected plants (sunflower and castor bean). The difference of seed quality showed the different inhibition of seed germination and seedling growth in two selected plants. The planting of high seed quality had the inhibition of seed germination and seedling growth which lesser than the planting of medium seed quality and low seed quality under water stress condition. The planting of sunflower with watered interval for four days exhibited that the maximum of inhibitory degree (68.04%) followed by the planting of sunflower with the watered interval for three days, the watered interval for two days and the watered interval for one day showed inhibitory degree for 55.37 37.97 and 27.01%, respectively. The planting of low seed quality of sunflower exhibited that the highest of inhibitory degree (56.70%), followed by the planting of medium seed quality of sunflower and the planting of high seed quality of sunflower showed the inhibitory degree for 46.81 and 37.79%, respectively. For castor bean testing, The planting of castor bean with watered interval for four days exhibited that the maximum of inhibitory degree (72.25%) followed by the planting of castor bean with the watered interval for three days, the watered interval for two days and the watered interval for one day showed inhibitory degree for 57.38 39.98 and 28.20%, respectively. The planting of low seed quality of castor bean exhibited that the highest of inhibitory degree (59.36%), followed by the planting of medium seed quality and the planting of high seed quality showed the inhibitory degree for 50.51 and 38.50%, respectively. The results showed that the planting of sunflower and castor bean must selection the high seed quality and selection of the planting of sunflower and castor bean whithout water stress condition. This result indicated that the comprehensive data of effects of water stress on seed germination and seedling growth against (sunflower and castor bean) as well as suggest select the optimum application of the high seed quality for the planting under water stress condition.

Keywords: Water Stress Treatments; Sunflower (Helianthus annuus); Castor Bean (Ricinus communis); Seed Germination; Seedling Growth Performance; Water Deficit (search for similar items in EconPapers)
Date: 2021
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DOI: 10.18483/ijSci.2435

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