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Performance of two Lupinus albus L. cultivars in response to three soil pH levels

  • Omnia M. Arief (a1) (a2), Jiayin Pang (a3) (a4), Kamal H. Shaltout (a5) and Hans Lambers (a1) (a4)


Soil alkalinity imposes important limitations to lupin productivity; however, little attention has been paid to investigate the effects of soil alkalinity on plant growth and development. Many lupins are sensitive to alkaline soils, but Lupinus albus material from Egypt was found to have tolerance to limed soils. The aim of this study was to compare the growth response of two cultivars of L.albus L. – an Egyptian cultivar, P27734, and an Australian cultivar, Kiev Mutant, to different soil pH levels and to understand the physiological mechanisms underlying agronomic alkalinity tolerance of P27734. Plants were grown under three pH levels (5.1, 6.7, and 7.8) in a temperature-controlled glasshouse. For both cultivars, the greatest dry mass production and carboxylate exudation from roots were observed at alkaline pH. The better performance of the Egyptian cultivar at high pH was entirely accounted for by its greater seed weight. From a physiological perspective, the Australian cultivar was as alkaline-tolerant as the Egyptian cultivar. These findings highlight the agronomic importance of seed weight for sowing, and both cultivars can be used in alkaline soils.


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Performance of two Lupinus albus L. cultivars in response to three soil pH levels

  • Omnia M. Arief (a1) (a2), Jiayin Pang (a3) (a4), Kamal H. Shaltout (a5) and Hans Lambers (a1) (a4)


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