De drieweg interactie tussen sorghum, Striga hermonthica en arbusculaire mycorrhiza schimmels

V.W. Lendzemo

Research output: Contribution to journalArticleProfessional

Abstract

Striga hermonthica is a major biological constraint to cereal production in Africa. The intricate association between this phytoparasite and the cereal host makes management difficult. Damage to the host begins before Striga comes out of the soil. Also, infestation correlates negatively with soil fertility. Arbuscular mycorrrhizal (AM) fungi have a variety of ecological functions ranging from improved uptake of immobile nutrients, protection of host from pathogens, to soil aggregation. The question whether these beneficial micro-organisms could play a role within the Striga-cereal (patho)system was addressed. Inoculating Striga-infested sorghum with AM fungi in pots or in the field resulted in a significant reduction in the performance of Striga in terms of numbers attached to the roots, relative time of emergence, numbers emerged and dry weight of Striga shoots at sorghum harvest. AM effects on Striga were more pronounced with the Striga-tolerant S-35 sorghum cultivar compared to effects with the Striga-sensitive CK60B. Inoculation with AM fungi compensated for damage by Striga in the S-35 cultivar. This compensation was independent of AM inoculum density and was not affected by P application. Germination of preconditioned Striga seeds after exposure to root exudates from sorghum colonized by AM fungi was significantly reduced, with effects more prominent with exudates from S-35 plants. AM fungi have the potential to affect Striga during germination, attachment, emergence, and possibly subsequent growth and development. It is important to understand the kind of management practices that farmers can apply to enhance mycorrhizal performance in an integrated management system
Original languageDutch
Pages (from-to)319-322
JournalGewasbescherming
Volume35
Issue number6
Publication statusPublished - 2004

Keywords

  • striga hermonthica
  • striga
  • mycorrhizas
  • sorghum bicolor
  • sorghum
  • plant interaction
  • weed biology
  • cameroon

Cite this

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title = "De drieweg interactie tussen sorghum, Striga hermonthica en arbusculaire mycorrhiza schimmels",
abstract = "Striga hermonthica is a major biological constraint to cereal production in Africa. The intricate association between this phytoparasite and the cereal host makes management difficult. Damage to the host begins before Striga comes out of the soil. Also, infestation correlates negatively with soil fertility. Arbuscular mycorrrhizal (AM) fungi have a variety of ecological functions ranging from improved uptake of immobile nutrients, protection of host from pathogens, to soil aggregation. The question whether these beneficial micro-organisms could play a role within the Striga-cereal (patho)system was addressed. Inoculating Striga-infested sorghum with AM fungi in pots or in the field resulted in a significant reduction in the performance of Striga in terms of numbers attached to the roots, relative time of emergence, numbers emerged and dry weight of Striga shoots at sorghum harvest. AM effects on Striga were more pronounced with the Striga-tolerant S-35 sorghum cultivar compared to effects with the Striga-sensitive CK60B. Inoculation with AM fungi compensated for damage by Striga in the S-35 cultivar. This compensation was independent of AM inoculum density and was not affected by P application. Germination of preconditioned Striga seeds after exposure to root exudates from sorghum colonized by AM fungi was significantly reduced, with effects more prominent with exudates from S-35 plants. AM fungi have the potential to affect Striga during germination, attachment, emergence, and possibly subsequent growth and development. It is important to understand the kind of management practices that farmers can apply to enhance mycorrhizal performance in an integrated management system",
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author = "V.W. Lendzemo",
year = "2004",
language = "Dutch",
volume = "35",
pages = "319--322",
journal = "Gewasbescherming",
issn = "0166-6495",
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De drieweg interactie tussen sorghum, Striga hermonthica en arbusculaire mycorrhiza schimmels. / Lendzemo, V.W.

In: Gewasbescherming, Vol. 35, No. 6, 2004, p. 319-322.

Research output: Contribution to journalArticleProfessional

TY - JOUR

T1 - De drieweg interactie tussen sorghum, Striga hermonthica en arbusculaire mycorrhiza schimmels

AU - Lendzemo, V.W.

PY - 2004

Y1 - 2004

N2 - Striga hermonthica is a major biological constraint to cereal production in Africa. The intricate association between this phytoparasite and the cereal host makes management difficult. Damage to the host begins before Striga comes out of the soil. Also, infestation correlates negatively with soil fertility. Arbuscular mycorrrhizal (AM) fungi have a variety of ecological functions ranging from improved uptake of immobile nutrients, protection of host from pathogens, to soil aggregation. The question whether these beneficial micro-organisms could play a role within the Striga-cereal (patho)system was addressed. Inoculating Striga-infested sorghum with AM fungi in pots or in the field resulted in a significant reduction in the performance of Striga in terms of numbers attached to the roots, relative time of emergence, numbers emerged and dry weight of Striga shoots at sorghum harvest. AM effects on Striga were more pronounced with the Striga-tolerant S-35 sorghum cultivar compared to effects with the Striga-sensitive CK60B. Inoculation with AM fungi compensated for damage by Striga in the S-35 cultivar. This compensation was independent of AM inoculum density and was not affected by P application. Germination of preconditioned Striga seeds after exposure to root exudates from sorghum colonized by AM fungi was significantly reduced, with effects more prominent with exudates from S-35 plants. AM fungi have the potential to affect Striga during germination, attachment, emergence, and possibly subsequent growth and development. It is important to understand the kind of management practices that farmers can apply to enhance mycorrhizal performance in an integrated management system

AB - Striga hermonthica is a major biological constraint to cereal production in Africa. The intricate association between this phytoparasite and the cereal host makes management difficult. Damage to the host begins before Striga comes out of the soil. Also, infestation correlates negatively with soil fertility. Arbuscular mycorrrhizal (AM) fungi have a variety of ecological functions ranging from improved uptake of immobile nutrients, protection of host from pathogens, to soil aggregation. The question whether these beneficial micro-organisms could play a role within the Striga-cereal (patho)system was addressed. Inoculating Striga-infested sorghum with AM fungi in pots or in the field resulted in a significant reduction in the performance of Striga in terms of numbers attached to the roots, relative time of emergence, numbers emerged and dry weight of Striga shoots at sorghum harvest. AM effects on Striga were more pronounced with the Striga-tolerant S-35 sorghum cultivar compared to effects with the Striga-sensitive CK60B. Inoculation with AM fungi compensated for damage by Striga in the S-35 cultivar. This compensation was independent of AM inoculum density and was not affected by P application. Germination of preconditioned Striga seeds after exposure to root exudates from sorghum colonized by AM fungi was significantly reduced, with effects more prominent with exudates from S-35 plants. AM fungi have the potential to affect Striga during germination, attachment, emergence, and possibly subsequent growth and development. It is important to understand the kind of management practices that farmers can apply to enhance mycorrhizal performance in an integrated management system

KW - striga hermonthica

KW - striga

KW - mycorrhizae

KW - sorghum bicolor

KW - sorghum

KW - planteninteractie

KW - onkruidbiologie

KW - kameroen

KW - striga hermonthica

KW - striga

KW - mycorrhizas

KW - sorghum bicolor

KW - sorghum

KW - plant interaction

KW - weed biology

KW - cameroon

M3 - Article

VL - 35

SP - 319

EP - 322

JO - Gewasbescherming

JF - Gewasbescherming

SN - 0166-6495

IS - 6

ER -