Changes in germination of the aged rice seeds after priming with rice bran, husks, brassinosteroids and chitosan
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Abstract
This study described rice bran and paddy husk that are by-products from rice. By immersing seeds, the researchers sought to increase seed germination efficiency by using rice bran and husk extracts from milled rice using three varieties of organic Thai rice seeds: KDML 105, Chai Nat 1, and Hom Nin, stored for 2 years at room temperature. Hom Nin rice seeds showed normal to high seedling compared to KDML105 and Chai Nat1. KDML 105 was shown the normal seedling responses to water-soaked rice bran and centrifuged rice bran, which was the same effect as soaked in water. It was found that the germination index of KDML 105 and Chai Nat1 responded to soaking in brassinosteroids, water-soaked rice bran, centrifuged rice bran, and centrifuged rice husks. For Hom Nin rice seeds had affected to high germination rates for all experimentals process. The use of brassinosteroid hormones in the three varieties of rice had affected on the increase of root lengths and root numbers, especially in Hom Nin. The maximum shoot dry weight was found in Chai Nat 1 which soaked in water. However, abnormal seeds, hard seeds, shoot heights, root dry weights, and root shoots did not display statistically significant differences
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