Record Details

Effects of early mycorrhization and colonized root length on low-soilphosphorus resistance of West African pearl millet

MELSpace

View Archive Info
 
 
Field Value
 
Title Effects of early mycorrhization and colonized root length on low-soilphosphorus resistance of West African pearl millet
 
Creator Beggi, Francesca
 
Contributor Falalou, Hamidou
Hash, Charles
Buerkert, Andreas
 
Subject arbuscular mycorrhizal fungi
p deficiency
p-acquistion efficiency
Pearl millet
 
Description Phosphorus (P) deficiency at early seedling stages is a critical determinant for survival and final
yield of pearl millet in multi-stress Sahelian environments. Longer roots and colonization with arbuscular
mycorrhizal fungi (AMF) enhance P uptake and crop performance of millet. Assessing
the genotypic variation of early mycorrhization and its effect on plant growth is necessary to better
understand mechanisms of resistance to low soil P and to use them in breeding strategies for
low P. Therefore, in this study, eight pearl millet varieties contrasting in low-P resistance were
grown in pots under low P (no additional P supply) and high P (+0.4 g P pot–1) conditions, and
harvested 2, 4, 6, and 8 weeks after sowing (WAS). Root length was calculated 2 WAS by scanning
of dissected roots and evaluation with WinRhizo software. AM infection (%) and P uptake
(shoot P concentration multiplied per shoot dry matter) were measured at each harvest. Across
harvests under low P (3.3 mg Bray P kg–1), resistant genotypes had greater total root length infected
with AMF (837 m), higher percentage of AMF colonization (11.6%), and increased P uptake
(69.4 mg P plant–1) than sensitive genotypes (177 m, 7.1% colonization and 46.4 mg P
plant–1, respectively). Two WAS, resistant genotypes were infected almost twice as much as
sensitive ones (4.1% and 2.1%) and the individual resistant genotypes differed in the percentage
of AMF infection. AMF colonization was positively related to final dry matter production in pots,
which corresponded to field performance. Early mycorrhization enhanced P uptake in pearl millet
grown under P-deficient conditions, with the genotypic variation for this parameter allowing selection
for better performance under field conditions.
 
Date 2016-06-15
2017-03-15T04:05:51Z
2017-03-15T04:05:51Z
 
Type Journal Article
 
Identifier https://mel.cgiar.org/dspace/limited
http://oar.icrisat.org/id/eprint/9615
Francesca Beggi, Hamidou Falalou, Charles Hash, Andreas Buerkert. (15/6/2016). Effects of early mycorrhization and colonized root length on low-soilphosphorus resistance of West African pearl millet. Journal of Plant Nutrition and Soil Science, 179 (4), pp. 466-471.
https://hdl.handle.net/20.500.11766/6487
Limited access
 
Language en
 
Rights CC-BY-NC-4.0
 
Format PDF
 
Publisher Wiley-VCH Verlag
 
Source Journal of Plant Nutrition and Soil Science;179,(2016) Pagination 466,471