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Root Phenotyping For Drought Tolerance in Bean Landraces From Calabria (Italy)

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Common bean (Phaseolus vulgaris) is cultivated throughout Latin America and
Africa, and for the European community, in Italy and Spain, areas are mainly
subjected to drought stress which is predict to worsen by regional climatic models.
The aims of this work were to identify the drought-tolerant and drought-sensitive
bean landraces using drought tolerance and phenotypic plasticity indexes
and to dissect the root morphological and 2D-architecture traits related to
drought tolerance. Thirty-one landraces from diverse gene pools and areas of the
Calabria region (South Italy), with different habits and morphological traits,
were screened for drought tolerance in a hydroponic system. Root phenotyping
was conducted by image analysis. Drought tolerance screening identified two
landraces as drought tolerant and sensitive, respectively. Under drought stress,
the drought-tolerant landrace exhibited several interesting root traits such as a
higher root length, surface area and, above all, the fineness of the whole root
systems and, with emphasis, of the higher order roots. Drought stress induced
plastic root responses in both bean landraces but with contrasting patterns. The
drought-tolerant landrace exhibited a dimorphic-rooted strategy, which could be
included in future utility for bean breeding programmes in drought-prone
environments.

Keywords: common bean; drought stress; landraces; root architecture; root morphology

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Ketersediaan

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Informasi Detail

Judul Seri

Journal Agronomy and Crop Science

No. Panggil

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Penerbit

New York : Blackwell Verlag GmbH., 2016

Deskripsi Fisik

J Agro Crop Sci,202 (2016) 1–12

Bahasa

English

ISBN/ISSN

0931-2250

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

202 (2016)

Subjek

PERTANIAN.

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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