Pre-sowing Treatment Enhanced Germination and Vigour of True Shallot (Allium cepa var. aggregatum) Seeds

Abstract

The objective of this research was to sudy the effects of pre-sowing treatments to enhance germination, growth and transplanting of true shallot seeds. The experiment was conducted in the glasshouse at Tangtu village, Badung regency from August until November 2017. Germination experiment was carried out in petridishes, while that for seedling vigour and growth experiment was done in plastic pots containing sand and top soil mixture. Both experiments were designed as complete randomized design with eight concentrations of KNO3 (1, 1.5 and 2 M) and GA3 (100, 150 and 200 ppm). Those treatments were replicated four times. Seeds were soaked for 24 hours in each concentration of solution prior to planting in petridishes as well as in pots. Results of the experiment showed that GA3 significantly increased germination percentage, speed of germination (57-63% germinated seeds at 1 dap), index of seedling vigour, speed of seedling emergence (34,39% day -1 ) and percentage of seedlings having one true leaf (52%) at 9 dap. The effects of KNO3 on those variables were not significantly different from those of GA3 except on speed of seedling emergence. KNO3 2M and GA3 (100, 150 , 200 ppm) resulted in 12 days earlier in transplanting seedlings than control.

Effect of seed invigoration by osmo-conditioning on radicle emergence and physiological parameters of the true seed of shallot (Allium ascalonicum L.)

“…However, the seed vigour can be improved through seed invigoration, i.e., by soaking the seeds in KNO 3 , PEG 6000 (Castañares, Bouzo 2018), GA 3 , ZnSO 4 and other osmotic solutions prior to planting (Kharat et al 2022). Research has shown that seed invigoration increases germination and the seedling establishment of onion seeds as compared to those of seed bulb crops, thereby ensuring uniformity and a specific growth rate (Mirabi, Hasanabadi 2012;Agung, Diara 2017). Seed invigoration has been proved to speed up germination and can be used to speed up the radicle emergence (RE) and reduce the mean germination time (Castañares, Bouzo 2018).…”

The effect of planting media and seed soaking on the growth of true shallot (Allium ascalonicum L.) seeds

“…This means that the process of producing bulbs takes longer than with seed bulb crops, as they must be burried in the ground. Efforts must be made to extend seed germination and accelerate seedling establishment in order to shorten the time spent in the nursery (Agung & Diara, 2017). The hard structure of seeds prevents roots and spots from growing as well as oxygen and water from penetrating the seed coat.…”