Potential of calcium nitrate to mitigate the aluminum toxicity in Phaseolus vulgaris: effects on morphoanatomical traits, mineral nutrition and photosynthesis.

摘要: Common bean (Phaseolus vulgaris) cultivation occurs mainly in regions with acidic soils, where high aluminum (Al) concentration is a major constraint to crop production. In this study, we evaluated tolerance and sensitivity traits Al exposure calcium (Ca) deficiency plants, determined the efficiency of Ca mitigate toxic effects. Two cultivars (BRS Estilo Campos Gerais) were grown three soil conditions: (I) liming hydroxide Ca(OH)2 unavailable (-Al+Ca); (II) fertilized nitrate [Ca(NO3)2·4H2O] available (+Al+Ca); (III) without addition (+Al-Ca). At beginning reproductive stage, photosynthetic processes, mineral nutrition, leaf anatomy morphological plants. The parameters good tools for monitor bean. +Al+Ca treatment mitigated deleterious effects on growth nutrition both cultivars. However, did not prevent anatomy. stress caused negative nutrient content, activity Calcium toxicity, primarily Gerais cultivar, showing potential improve productivity acid soils.