Samet, Halil Kocaeli University - Vocational School of Food and Agriculture - Department of Crop and Animal Production, Turkey , Çıkılı, Yakup Duzce University - Cilimli Vocational School - Department of Crop and Animal Production, Turkey

Response of purslane (Portulaca oleracea L.) to boron toxicity

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This study was undertaken to determine the effects of increasing boron (B) in purslane (Portulaca oleraceae L.). Two variety of purslane, Mercan (a variety cultivated widely) and Wild (a variety grown in nature spontaneously), were used for glasshouse experiment with the following treatments: 0, 5, 10, 25 mg B kg^-1. Plant growth, total chlorophyll (Chl) and carotenoid (Car) reduced significantly in B- stressed plants. Total Chl and Car contents in Wild were greater than in Mercan. While shoot and root ratio (SRR) and membrane permeability (MP) were increased by applied B, relative water content (RWC) showed an indecisive trend in both varieties. Also, the content and uptake of B in shoot and root increased in parallel to increasing B levels, except for the highest B level in root. While uptakes of phosphorus (P) and potassium (K) decreased with increasing B levels, Calcium (Ca) uptake showed an indecisive trend in both varieties. Na uptakes increased in Mercan, whereas it decreased in Wild. The P and K uptakes were greater in Mercan, whereas the Ca and Na uptakes were greater in Wild. It was concluded that purslane showed different responses to increasing B levels and biomass production was greater in Mercan than in Wild.

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Boron toxicity , Nutrient uptake , Plant growth , Portulaca oleraceae , Purslane

Anadolu Journal Of Agricultural Sciences

455