Effect of microwave radiation on seed viability, survival of Aspergillus niger van Tieghem and oil quality of oilseeds crops canola, soybean and safflower

Abstract

The effect of microwave's radiation on seed viability of three different oilseed crops, spores of Aspergillus niger and quality of extracted oil from treated seeds over various exposure times was evaluated. The seeds were exposed to 2450 MHz. at five different power levels of 0, 100, 200, 400, 600 and 800 W for two exposure times of three and five minutes. At a given time, a direct negative relationship between seed viability and microwave's radiation power level was detected. Substantial variation in the lethality of tested seeds to microwave's power levels was apparent in the fiducial limits of the estimated LD 50 values in probit analysis approach. A similar trend of A. niger spores' susceptibility to microwave radiation was detected. The microwaves' radiation and exposure time did not impact one another and a significant interaction was not detected. Short term fungal infection did not cause substantial quantitative and qualitative damage to the oilseeds. The oil quality was generally unaffected by microwave radiation and fungal infestation for tested oilseeds. Moreover, microwave radiation decreased seed germination percentage and vigor index. The microwave radiation could provide an effective and friendly environmental treatment technique for improving the dietary consumption of the oil in any seed disinfestation program.

Aplikasi Gelombang Mikro sebagai Pengendali Cendawan Patogen Terbawa Benih Kedelai

“…Sementara Reddy et al (1995) menyatakan, semakin lama durasi perlakuan gelombang mikro pada benih kedelai yang diinokulasi buatan dengan patogen Diaphorte phaseolorum, tingkat infeksi patogen semakin menurun, serta diikuti dengan penurunan daya berkecambah dan vigor benih. Penelitian lain yang dilakukan oleh Motallebi (2016) terhadap benih kanola, kedelai dan kesumba yang diinokulasi buatan dengan A. niger menunjukkan bahwa semakin tinggi daya gelombang mikro, menyebabkan viabilitas benih dan tingkat infeksi patogen A. niger semakin menurun. Pada penelitian sebelumnya, kadar air benih yang digunakan jauh lebih tinggi dari persyaratan kadar air maksimum benih kedelai bersertifikat (11%), selain itu cendawan patogen yang digunakan untuk inokulasi buatan hanya satu spesies.…”