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Ciência Rural

Print version ISSN 0103-8478On-line version ISSN 1678-4596

Abstract

BRESOLIN, Adriana Pires Soares et al. Cold tolerance of forage peanut. Cienc. Rural [online]. 2008, vol.38, n.4, pp.1154-1157. ISSN 0103-8478.  http://dx.doi.org/10.1590/S0103-84782008000400041.

The yield of tropical perennial forages in temperate climate areas depends on its cold tolerance. The exposure of genotypes to temperatures below 2oC, under controlled conditions is an efficient methodology to predict cold tolerance, since it maintains homogeneous levels of cold. Due to absence of information related to cold tolerance of tropical forages, this experiment was developed aiming to evaluate the behavior of forage peanut exposed to temperatures below 2oC. The design adopted was completely randomized with 15 replications and two treatments: exposed and not exposed to cold. The traits measured were: number of leaves per stolon; thickness of stolon and number of new shoots. The results showed that the exposition of the forage peanut to a range of temperature from -1.0 to 1.3 °C, for 3 hours, causes cold stress in the plants, resulting in a reduction of the number of leaves per solon and stimulating the emergency of new shoots, but did not kill the plants.

Keywords : Arachis pintoi; tropical forage; cold tolerance.

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