Positive effects of karrikin on seed germination of three medicinal herbs under drought stress
Publish place: Iran Agricultural Research، Vol: 35، Issue: 2
Publish Year: 1395
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_IAR-35-2_008
تاریخ نمایه سازی: 13 شهریور 1402
Abstract:
ABSTRACT- Improper seed germination is a serious challenge for medicinal herbs under drought stress conditions in semi-arid and arid regions. A new group of plant growth regulators known as karrikins have been proved useful to improve seed germination in some plants. In this regard, the effects of karrikin on seed germination and vigor of three medicinals under drought stress were examined. Seeds of Trachyspermum copticum (L.) Link, Foeniculum vulgare Miller, and Cuminum cyminum L. were sowed under drought treatments (-۱, -۱.۵, -۲ and -۲.۵ MPa of PEG ۶۰۰۰), with and without synthetic Karrikin GR۲۴ (۱۰µM). Results indicated increasing osmotic pressure seed germination characteristics were severely reduced; however, karrikin significantly increased the seed germination of the three herbs. The application of karrikin in all drought conditions significantly increased germination percentage, germination rate, germination index, seedling vigor, shoot length and radicle length of all herb seedlings. Ajwain (T. copticum) showed a greater drought tolerance compared to the other medicinal species.
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Authors
M. MousaviNik
Department of Agronomy, College of Agriculture, University of Zabol, Zabol, I. R. Iran
Abolfazl Jowkar
Department of Horticultural Science, College of Agriculture, Shiraz University, Shiraz, I. R. Iran
A. RahimianBoogar
Department of Horticultural Science, College of Agriculture, Shiraz University, Shiraz, I. R. Iran
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