Effect of Surface Microbiome and Osmo-Conditioning on Restoration of Storage-Induced Losses of Seed Viability in Muskmelon (Cucumis melo L.)

Document Type : Original Research

Authors
A. Kalia 1
S. P. Sharma 2
S. Devi 3
1 Electron Microscopy and Nanoscience Laboratory, Department of Soil Science, Ludhiana, Punjab, India-141004.
2 Department of Vegetable Science, Ludhiana, Punjab, India-141004.
3 ICAR-Central Potato Research Station, Jalandhar, Punjab, India-144003.
Abstract
Seed priming can restore age-induced loss of seed viability or longevity; however, these invigoration responses may vary with priming agents and seed aging duration. The present study investigated the effect of two potassium salts (K-salts) individually and in combination (1:1) on different lots of muskmelon genotype, MS-1 seeds stored for four consecutive years, from 2013 to 2016 under ambient conditions. The combination of K-salts significantly enhanced the percent germination of seeds stored for two years (from 2015 to 2016). Further, it also improved root morpho-traits of 10-day-old seedlings. The storage duration had significant effect on the seed surface bacterial and fungal populations. A significantly higher cfu mL-1 microbial counts were recorded for 2013 harvested seeds on three different agar-based media compared to 2014 to 2016 stored seeds. Further, the Scanning EM and FT-IR study revealed the surface microbiological status and functional groups variations, respectively. Thus, aging-related seed coat microflora is responsible for deterioration of the seed coat. Osmo-conditioning cannot restore viability of seeds stored under ambient conditions for more than two years.

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Journal of Agricultural Science and Technology
Volume 22, Issue 1
January and February 2020
Pages 221-233