Method for evaluation of root hairs of common bean genotypes

Vieira, Rogério Faria; Jochua, Celestina Nhagupana; Lynch, Jonathan P.

doi:10.1590/s0100-204x2007000900020

Cited by 21 publications

(20 citation statements)

References 8 publications

(7 reference statements)

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“…In 2012WUS and 2013DUS, the roots from the third sampling (30 DAS) were stored in 70% ethanol. Root hairs on the basal 2−3cm of nodal roots were visually evaluated as described by Vieira et al (2007) by two to three researchers, each observing different roots, after staining with 0.05% trypan blue, and using a rating scale of 1−5 to rank root hair length and density ( Supplementary Table S1 ). Lateral roots were visually evaluated using a rating scale of 0−3 ( Supplementary Table S1 ) in 2013DUS.…”

Section: Methodsmentioning

confidence: 99%

Traits and QTLs for development of dry direct-seeded rainfed rice varieties

Sandhu

Torres

Cruz

et al. 2014

Journal of Experimental Botany

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Section: Methodsmentioning

confidence: 99%

Traits and QTLs for development of dry direct-seeded rainfed rice varieties

Sandhu

Torres

Cruz

et al. 2014

Journal of Experimental Botany

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“…Twenty common bean genotypes were assessed (Table 1). Among them, G 4000 and G 2333 were used as a standard for efficiency, and the Dor 364 genotype was used as a standard of inefficiency, as it is characterized as having roots with little vigor (Vieira et al, 2007 andVieira et al, 2008).…”

Section: Methodsmentioning

confidence: 99%

Efficiency in the use of phosphorus by common bean genotypes

Silva¹,

Esteves²,

Messias

et al. 2014

Sci. agric. (Piracicaba, Braz.)

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Common bean (Phaseolus vulgaris L.) is frequently grown in weathered soils with low phosphorus (P) availability, and this is one of the main limitations on its production. This study aimed to assess 20 common bean genotypes in a hydroponic system to select the best P concentration for inducing nutritional deficiency and to classify the genotypes in terms of nutrient utilization efficiency. The concentrations of P applied were 8.00, 4.00, 2.00 and 0.05 mg L -1. At 21 days, in the plot subjected to an application of the most severe stress, the 0.05 mg L -1 dose of P, had smaller plant size and early leaf abscission was observed. The 4.00 mg L -1 dose of P was the most efficient in inducing stress for discrimination of cultivars in terms of efficiency of use of P. The following genotypes: IAPAR 81, Carioca Comum, IAC Carioca Tybatã, IAC Imperador and G 2333 stood out as being efficient and responsive to P, while the two cultivars DOR 364 and Jalo Precoce were the most inefficient and unresponsive.

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“…Although the benefits of root hairs are not evident in high‐fertility soils (Wen & Schnable, ), they do not appear to generate fitness trade‐offs, possibly because they have little impact on root metabolic costs (Bates & Lynch, ). Root hair phenotypes can be rapidly screened in seedlings in growth pouches (Vieira et al ., ), opening the possibility of direct phenotypic selection in poorly resourced breeding programs in developing countries. The substantial variation for root hair length and density in crop germplasm, the substantial benefit this variation affords for nutrient capture, and the ease of screening for these phenotypes call for aggressive deployment of this trait in crop breeding programs (Table ).…”

Section: Cross‐cutting Issuesmentioning

confidence: 99%

Root phenotypes for improved nutrient capture: an underexploited opportunity for global agriculture

2019

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Summary Nutrient‐efficient crops are a solution to the two grand challenges of modern agriculture: improving food security while reducing environmental impacts. The primary challenges are (1) nitrogen (N) and phosphorus (P) efficiency; (2) potassium (K), calcium (Ca), and magnesium (Mg) efficiency for acid soils; and (3) iron (Fe) and zinc (Zn) efficiency for alkaline soils. Root phenotypes are promising breeding targets for each of these. The Topsoil Foraging ideotype is beneficial for P capture and should also be useful for capture of K, Ca, and Mg in acid soils. The Steep, Cheap, and Deep ideotype for subsoil foraging is beneficial for N and water capture. Fe and Zn capture can be improved by targeting mechanisms of metal mobilization in the rhizosphere. Root hairs and phenes that reduce the metabolic cost of soil exploration should be prioritized in breeding programs. Nutrient‐efficient crops should provide benefits at all input levels. Although our current understanding is sufficient to deploy root phenotypes for improved nutrient capture in crop breeding, this complex topic does not receive the resources it merits in either applied or basic plant biology. Renewed emphasis on these topics is needed in order to develop the nutrient‐efficient crops urgently needed in global agriculture.

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Method for evaluation of root hairs of common bean genotypes

Cited by 21 publications

References 8 publications

Traits and QTLs for development of dry direct-seeded rainfed rice varieties

Traits and QTLs for development of dry direct-seeded rainfed rice varieties

Efficiency in the use of phosphorus by common bean genotypes

Root phenotypes for improved nutrient capture: an underexploited opportunity for global agriculture

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