Title:	Initial root length in wheat is highly correlated with acid soil tolerance in the field.
Authors:	PEREIRA, J. F.
Affiliation:	JORGE FERNANDO PEREIRA, CNPGL.
Date Issued:	2018
Citation:	Scientia Agricola, v. 75, n. 1, p. 79-83, 2018.
Description:	ABSTRACT: In acid soils, toxic aluminum ions inhibit plant root growth. In order to discriminate aluminum (Al) tolerance, trustful screening techniques are required. In this study, 20 wheat cultivars, showing different levels of Al tolerance, were evaluated in a short-term soil experiment to access their relative root length (RRL). Moreover, the alleles of two important genes (TaALMT1 and TaMATE1B) for Al tolerance in wheat were discriminated. Both of these genes encode membrane transporters responsible for the efflux of organic acids by the root apices that are thought to confer tolerance by chelating Al. Genotypes showing TaALMT1 alleles V and VI and an insertion at the TaMATE1B promoter were among the ones showing greater RRL. Mechanisms of Al tolerance, which are not associated with organic acid efflux, can be potentially present in two cultivars showing greater RRL among the ones carrying inferior TaALMT1 and TaMATE1B alleles. The RRL data were highly correlated with wheat performance in acid soil at three developmental stages, tillering (r = &#8722;0.93, p < 0.001), silking (r = &#8722;0.91, p < 0.001) and maturation (r = &#8722;0.90, p < 0.001), as well as with the classification index of aluminum toxicity in the field (r = &#8722;0.92, p < 0.001). Since the RRL was obtained after only six days of growth and it is highly correlated with plant performance in acid soil under field conditions, the short-term experiment detailed here is an efficient and rapid method for reliable screening of wheat Al tolerance.
Thesagro:	Triticum Aestivum
Keywords:	Aluminum tolerance Citrate and malate transporters Short-term soil experiment
DOI:	10.1590/1678-992x-2016-0422
Type of Material:	Artigo de periódico
Access:	openAccess
Appears in Collections:	Nota Técnica/Nota científica (CNPGL)