Pengaruh Konsentrasi dan Lama Perendaman GA3 terhadap Perkecambahan Benih dan Pertumbuhan Bibit Johar (Cassia seamea)

Abstract

Johar (<em>Cassia seamea</em>) is a medicinal plant with a cassiarin A compound to combat malaria and has a low Cassiarin A is an active compound in Johar (<em>Cassia seamea</em>) medicinal plant capable of combating malaria, despite showing a low seed production rate due to dormancy. This inactivity is severed using gibberellic acid (GA<sub>3</sub>) treatments. This study aims to determine the effects of concentration and soaking period of GA<sub>3</sub> on seed germination and growth of Johar seedlings. A completely randomized design (CRD), consisting of 2 treatments was applied as the research method. The first treatment employed GA<sub>3</sub> concentrations of 0, 45, 90 and 135 ppm, while the second was based on the soaking interval at 6, 12, 18 and 24 hours. The results showed the capacity of GA<sub>3</sub> able to shatter the seed dormancy with percentage germination of 43.03% and a concentration of 50.28 ppm. Therefore, the interaction of the two treatments significantly influenced the growth of Johar seedlings. Consequently, the concentration of GA<sub>3</sub> at 79.89 ppm increased the root length to 52.19 cm, while 84.68 ppm produced a total of 20.91 roots, after a 6 hour soaking. In addition, the 96.67 ppm expanded the stem diameter by 0.93 cm.

Provenance variation in seed storability of jabon (Neolamarckia cadamba) and their response to seed invigoration by priming and gamma irradiation treatments

“…Osmo-priming with PEG had significantly improved root viability and chlorophyll content, and supported seedlings to maintain relative water content under adverse soil moisture environments (Zhang et al 2015). While, GA3 is a growth hormone that can accelerate the process of stem elongation, leaf growth, roots, affect growth, and root differentiation (Huang et al 2014;Yunus et al 2020). GA3 treatment was able to increase the plant height, stem and total dry matter, leaf and root fresh matter and net assimilation (Al-Hawezy et al 2013;Dilip et al 2017).…”