Abstract

The use of cashew (Anacardium occidentale L.) genotypes tolerant to aluminum may be a strategy to increase crop production in regions with predominance of acid-reactive soils, low nutrient availability and high concentrations of exchangeable aluminum. The objective of this study was to verify the effect of interaction rootstock and scion of dwarf cashew genotypes and aluminum tolerance. An experiment was performed with dwarf cashew grafted seedlings, three genotypes were evaluated as rootstock ('CCP 06', 'CCP 09' and 'CCP 76') and three as scion ('CCP 76', 'Embrapa 51' and 'BRS 226'). Plants were grown in the absence and presence of aluminum (30 mg L⁻¹ Al) in a nutrient solution with six replications. One hundred and ten days after the beginning of aluminum exposure, plants were evaluated for biometric parameters and aluminum accumulation in the stem, leaves and roots. The largest accumulation of aluminum in dwarf cashew plants occurred in the roots, but a lower accumulation in stems and leaves. The use of the dwarf cashew genotype 'CCP 09' as rootstock and the 'CCP 76' and 'Embrapa 51' as scion, resulted in grafted seedlings with greater tolerance to aluminum.

摘要

耐铝的腰果（Anacardium occidentale L.）基因型的使用可能是在酸反应性土壤占优势，养分利用率低和可交换铝浓度高的地区提高作物产量的一种策略。这项研究的目的是验证相互作用的砧木和矮腰果基因型的接穗和铝耐性的影响。对矮腰果嫁接苗进行了实验，评估了三种基因型作为砧木（'CCP 06'，'CCP 09'和'CCP 76'），三种作为接穗（'CCP 76'，'Embrapa 51'和'BRS 226） '）。在不存在铝（30 mg L ^-1）的条件下生长植物在六次重复的营养液中。铝暴露开始一百一十天后，评估植物的生物特征参数以及铝在茎，叶和根中的积累。矮腰果植物中铝的最大积累发生在根部，而茎和叶中的积累较少。使用矮腰果基因型'CCP 09'作为砧木，使用'CCP 76'和'Embrapa 51'作为接穗，导致嫁接的幼苗对铝的耐受性更高。