A factor from Azospirillum brasilense inhibits germination and radicle growth of Orobanche aegyptiaca

Dadon, Tikva; Nun, Nurit Bar; Mayer, Alfred M.

doi:10.1560/q3ba-8bjw-w7gh-xhpx

Cited by 31 publications

(12 citation statements)

References 6 publications

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“…In this connection, Zermane et al [27] showed high biocontrol activity against both O. crenata and O. foetida species and positively influenced faba bean growth by five isolates of P. fluorescens. The nitrogen-fixing bacterium Azospirillum brasilense has been reported to inhibit germination and radical growth of O. aegyptiaca [28] and Striga hermonthica [29].…”

Section: Discussionmentioning

confidence: 99%

The Potential of Cell-free Cultures of Rhizobium leguminosarum, Azotobacter chroococcum and Compost Tea as Biocontrol Agents for Faba Bean Broomrape (Orobanche crenata Forsk.)

El-Halmouch¹,

Mehesen²,

El-Shanshoury³

2013

J Plant Pathol Microbiol

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In the present study, cell-free cultures of four isolates of Rhizobium leguminosarum, an isolate of Azotobacter chroococcum and compost tea were investigated for their biocontrol potential against the root parasitic weed Orobanche crenata. Individual cell-free cultures of Azotobacter chroococcum or Rhizobium sp., dual and mixture of cell-free cultures of Rhizobium spp. or compost tea were applied to infested pots in greenhouse conditions. The treatments showed variable effects on many developmental parameters of both faba bean and broomrape. Significant decrease in the number of broomrape attachments, dry weight of the attached tubercles on faba bean roots and the reduction in percentage of broomrape seed germination were recorded. Compost tea, individual and mixture of R. leguminosarum isolates were more reducing on broomrape germination and growth than A. chroococcum alone did; being the former treatment is the best. The reduction in broomrape incidence by compost tea was due to certain phenotypic mechanisms, which acted alone or in combination. These mechanisms included negative effect of natural stimulant broomrape on seed germination, prevention of radical penetration inside the host roots, parasite yield reduction, and thus increasing the growth and vitality of faba bean. In vitro experiment indicated that seed germination percentage of broomrape was also negatively affected by the combination of root-exudates and compost tea. Radical apexes of the germinated seeds were distorted. These distortions may prevent the radicals to follow up the infestation. In conclusion, the study presents the potential of R. leguminosarum isolates and compost tea in biocontrol of broomrape. More investigations should be carried out with viable bacterial cells on the parasite plant before use in sustainable agricultural systems.

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Section: Discussionmentioning

confidence: 99%

The Potential of Cell-free Cultures of Rhizobium leguminosarum, Azotobacter chroococcum and Compost Tea as Biocontrol Agents for Faba Bean Broomrape (Orobanche crenata Forsk.)

El-Halmouch¹,

Mehesen²,

El-Shanshoury³

2013

J Plant Pathol Microbiol

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“…Azospirillum brasilense inhibits germination and radicle growth of O. aegyptiaca (Dadon et al 2004). Colonization by AMF can also provide protection against parasitic weeds.…”

Section: Most Of the Insects Which Have Been Reported To Occur Onmentioning

confidence: 99%

Managementof orobanche in field crops: A review

Habimana

Nduwumuremyi

2014

J. Soil Sci. Plant Nutr.

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Broomrapes (Orobanche sp.) are a root holoparasitic plant devoid of chlorophyll and entirely depending on the host for nutritional requirements. They cause considerable yield losses (5-100 %) in the crops, especially in the drier and warmer areas of Europe, Africa and Asia where it is reported to mainly parasitize species of leguminous, oilseeds, solanaceous, cruciferous and medicinal plants. It is a serious root parasite threatening the livelihood of the farmers with its devastating effect on the some of aforementioned crops. The long-term impact of the broomrapes is even more serious: their seeds may easily spread to other fields, and can persist in soil up to 20 years, leading to an accelerated increase in the infested areas in which susceptible crops are under danger. Orobanche seed dispersal is facilitated by man, agricultural tools, crop seeds, propagules and also by animals through their excreta. This review will discuss and summarize alternative methods viz preventive, physical, chemical, agronomic, biological, crop resistance and integrated methods which are needed to manage this parasite. However, the main concern is that, up to date, no single cheap method of control proved to be effective, economical and complete in protection against this parasite. For that reason, an integrated approach is needed in which a variety of such techniques are combined, in order to maintain parasite populations below threshold levels of damage.

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“…, 2004). The nitrogen‐fixing bacterium Azospirillum brasilense inhibits germination and radicle growth of P. aegyptiaca (Dadon et al. , 2004) and Striga hermonthica (Del.)…”

Section: Suppressive Soilsmentioning

confidence: 99%

Revisiting strategies for reducing the seedbank of Orobanche and Phelipanche spp.

et al. 2009

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Summary Weedy Orobanche and Phelipanche species are important in Southern and Eastern Europe, the Middle East and North Africa, and have recently been reported in the USA, Australia and some countries in South America. Rather than being controlled, the Orobanche and Phelipanche problem is increasing, both in intensity and in acreage. Large areas of new territory are at risk of invasion, if care is not immediately taken to limit the introduction of parasitic seeds and to educate farmers and others to be alert for new infestations. There is an urgent need to re‐evaluate novel integrated Orobanche and Phelipanche management programmes that will allow a better control of the parasite species and limit their distribution. The main obstacle in the long‐term management of Orobanche and Phelipanche infested fields is the durable seedbank, which may remain viable for decades in the field. Large quantities of long‐lived seeds give the parasite genetic adaptability to changes in host resistance and cultural practices. As long as the seedbank is not controlled, the need to control the parasite will persist whenever a susceptible host is grown in the infested field. We discuss strategies for seedbank reduction, paying particular attention to cultural practices, whereas chemical and biological control methods are covered by other reviews in this issue.

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A factor from Azospirillum brasilense inhibits germination and radicle growth of Orobanche aegyptiaca

Cited by 31 publications

References 6 publications

The Potential of Cell-free Cultures of Rhizobium leguminosarum, Azotobacter chroococcum and Compost Tea as Biocontrol Agents for Faba Bean Broomrape (Orobanche crenata Forsk.)

The Potential of Cell-free Cultures of Rhizobium leguminosarum, Azotobacter chroococcum and Compost Tea as Biocontrol Agents for Faba Bean Broomrape (Orobanche crenata Forsk.)

Managementof orobanche in field crops: A review

Revisiting strategies for reducing the seedbank of Orobanche and Phelipanche spp.

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