Influence of seed osmoconditioning on tomato seed vigor
1997
Kraisri Pisithkul (Rajamangala Institute of Technology. Lampang Campus, Lampang (Thailand))
Seed osmoconditioning has reportedly improved the seed germination rate of various crop species, but little information indicates osmoconditioning improves seed germination or vigor of local crops. A study at Rajamangala Institute of Technology, Lampang Campus, conducted between June 9 and October 10, 1996 was aimed to compare the effect of various seed osmoconditioning treatments on germination percentage, mean rate of germination (MRG), germination performance index (GPI) and the storability of the local tomato cultivar L-22 and Sidatip 1. The seeds were osmoconditioned with KNO3 and polyethylene glycol 8000 (PEG) solutions at the osmotic potential (psis) of -1.1, -1.3 and -1.5 megapascals (MPa). The experimental design was CRD with 3 replications. Osmoconditioning improved the seed germination percentage, MRG and GPI of L-22 and improved MRG and GPI of Sidatip 1 in comparison to the unconditioned seeds. The MRG and GPI of L - 22 seeds that were conditioned in KNO3 were superior to those seeds conditioned in PEG. Among psi(s) levels, conditioning at psi(s) -1.1 MPa there was more of a decrease in the MRG and more of an increase in the GPI than at other levels. Whereas Sidatip 1 seeds, the MRG and the GPI were improved by PEG compared to KNO3, and conditioning at -1.3 MPa in PEG gave the best results. The result of the study also showed the effect of osmoconditioning was consistent regardless of the period of storage.
Show more [+] Less [-]AGROVOC Keywords
Bibliographic information
This bibliographic record has been provided by Thai National AGRIS Centre, Kasetsart University
