ArticleBMC plant biology2024
Comparative study of seed germination, phenology, and reproductive fitness in Melilotus sulcatus populations from Israel.
Article in BMC plant biology, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
backgroundMelilotus sulcatus (Fabaceae) is an annual weed species prevalent in the Mediterranean Basin and Asia, characterized by a hard seed coat, indicating physical seed dormancy and long seed-bank longevity. This weed exhibits high phenotypic plasticity, thriving across various climatic regions in Israel. This study investigates seed germination of M. sulcatus populations under different temperatures. Moreover, we have studied the phenology, and reproductive biology of M. sulcatus populations in a common garden experiment. Seeds of M. sulcatus were collected from onion fields at Kibbutz Grofit located in the hyper-arid Southern Arava region, with ~ 30 mm average annual rainfall, and from Kibbutz Yifat, in the Jezreel Valley, where annual rainfall is 450-650 mm. Progeny generations were grown in pollen-proof cages at Newe Ya'ar Research Center also located at the Jezreel Valley.
resultsDifferences in seed area and average weight were observed among populations and generations, with field populations producing heavier seeds compared to progeny populations. The optimal temperature (T
conclusionsOverall, our findings underscore the adaptive strategies employed by M. sulcatus populations in response to their environment. Vigorous plant growth, a higher number of seeds per pod, and larger seed area and average weight were observed in individuals from the Grofit population compared to the Yifat population. The greater fitness of Grofit population, originated from hyper-arid conditions, highlights the significant impact of environmental factors on species adaptation.
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