IN VITRO EVALUATION OF SOME SOIL RHIZOSPHERE BACTERIA FOR BIOLOGICAL CONTROL OF STRIGA HERMONTHICA (DEL.) BENTH
Journal Title: Journal of Advances in Internal Medicine - Year 2011, Vol 2, Issue 2
Abstract
Striga hermonthica is a devastating root parasitic weed on cereals. In the present investigation a series of laboratory experiments was undertaken to study the effects of some soil borne bacteria on germination and haustorium initiation in S. hermonthica. A total of 211 bacterial strains and isolates were screened, in a series of preliminary laboratory experiments, for ability to reduce GR24-induced Striga germination. Isolates and strains displaying inhibitory effects (26) were further screened to confirm their suppressive effects on GR24-induced germination, study their influence on Striga germination in response to ACC and on haustorium initiation in response to DMBQ and sorghum root macerate. Striga seeds conditioned in a broth medium inoculated with bacteria showed differential response to GR24 and ACC. Some of the bacterial isolates and strains reduced germination, irrespective of the stimulant used, while others inhibited germination induced by one of the stimulants, but not the other. Haustorium initiation in response to DMBQ and sorghum root macerate showed differential response to bacterial strains and isolates. Some bacterial isolates and strains had no effects on haustorium initiation, while others reduced it, irrespective of the inducing factor. The differential response in germination to GR24 and ACC could be due to bacterial metabolites that curtail production of ACC or its conversion into ethylene. Curtailment of haustorium initiation by bacteria may be attributed to production of inhibitory compounds and/or extracellular enzymes that degrade DMBQ or curtail its production. The study supports the biotic nature of the reported soil suppressiveness to S. hermonthica and indicates that inoculation of soil with bacteria may perturb early developmental stages of parasitism and reduce the devastating effects of the parasite.
Authors and Affiliations
MOHAMMED MAHGOUB HASSAN*| Environment and Natural Resources Research Institute, Khartoum, Sudan., MIGDAM EL SHEIK ABDEL GANI| National Centre for Research, Khartoum, Sudan., ABDEL GABAR EL TAYEB BABIKER| Sudan University of science and technology faculty of Agriculture.
Keywords
Related Articles
- EP ID EP4816
- DOI -
- Views 464
- Downloads 19
Clinical profile of Spondarthritis in females as compared to male patients with reference to HLAB27: A single center study from Nepal
Background and Aims-To study the differences in clinical parameters between male and female patients with spondarthritis (SpA) in Nepalese population; to study the prevalence of HLA B27 phenotype in Nepalese patients wit...
Rituximab Monotherapy for Primary Cutaneous Follicle Center Lymphoma
Primary cutaneous follicle center lymphoma is a rare disorder. Although there are several treatment options, large clinical trials on the treatment of primary cutaneous follicle center lymphoma are lacking. Optimal treat...
Trends and in- hospital mortality of Acute Coronary Syndrome at Shahid Gangalal National Heart Centre, Kathmandu, Nepal during 2001-2012
Background and aims: Acute coronary syndrome (ACS), which comprises acute ST-segment elevation myocardial infarction, non-ST segment elevation myocardial infarction and unstable angina is a major health problem and repre...
Skin Lesions and Lower Extremity Edema in a newly diagnosed HIV patient
The differential diagnosis of skin lesions in human immunodeficiency virus patients is diverse and includes both infectious and non infectious causes. In this case presentation, a 37 year old male newly diagnosed with HI...
Changes in Heart Rate Variability and Glycosylated Hemoglobin in Prediabetics and Type 2 Diabetes Mellitus
Background: People with diabetes mellitus (DM) suffer from cardiac autonomic neuropathy (CAN), this may remain subclinical and reduced heart rate variability (HRV) is Objective: The present study was undertaken to invest...