Effects of Seed Priming with Plant Nutrients and Hormones on Germination and Growth of Morning Glory (Ipomoea aquatica Forsk.)
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Abstract
The long period of seed storage can decrease seed quality. Seed priming is a
method that has been used to enhance seed quality. Thus, this experiment aimed to study the water uptake period of seed and seed priming using plant nutrients and hormones on the germination and growth of morning glory at the seed laboratory, Lamtakong Research Station, Nakhon Ratchasima province. The results of studying the water uptake period of morning glory seeds found that the morning glory seeds absorbed water rapidly in the first hour and remained
stable at the second hour. This water uptake period was then used to study the effect of seed priming using plant nutrients and plant hormones. A completely randomized design (CRD) was conducted with 6 treatments, namely control (Non-primed seed) and seed priming with CaCl2,
MgSO4, KNO3, 1-Naphthaleneacetic acid (NAA), and gibberellin (GA3). The results revealed that priming morning glory seeds with different treatments statistically significantly affected seed germination (P < 0.01), resulting in increased seed germination percentage and germination
index as compared to non-primed seeds. For the germinal test in the field emergence, seeds primed by dipped in KNO3 at 300 ppm resulted in high seed germination percentage (98.00 ± 0.82%) and germination index (33.00 ± 0.45). It also led to high stem length (15.48 ± 0.50 cm)
and fresh weight (7.58 ± 0.70 g) of morning glory seedlings.
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