In vitro studies on the effects of herbicides on the growth of rhizobia

Singh, Guriqbal; Wright, D. J.

doi:10.1046/j.1472-765x.2002.01117.x

Cited by 49 publications

(32 citation statements)

References 16 publications

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“…In dual application of pre followed by post emergence herbicide, the highest Rhizobium population was noticed in pendimethalin (PRE) + phenaxoprop ethyl (POE) applied treatment (3.14 x 10 4 cfu per gram of soil) and lowest count of Rhizobium was found in pendimethalin + oxyfluorfen treated plot (2.98 x 10 4 cfu per gram of soil). Similar results reported by Singh and Wright (2002) that the adverse effect of herbicides on nodulation and nitrogen fixation in legumes by affecting the nitrogen-fixing Rhizobia (Rhizobium leguminosarum population). Whereas, Felipe et al, (1987) suggested that, the direct effects of herbicides on the plant, decreased the number of nitrogen-fixing bacteroids.…”

Section: Resultssupporting

confidence: 87%

Nodulation and Yield Response of Chickpea (Cicer arietinum L) to Pre and Post Emergence Herbicides

Raghavendra¹,

Gundappagol²

2017

Int.J.Curr.Microbiol.App.Sci

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Section: Resultssupporting

confidence: 87%

Nodulation and Yield Response of Chickpea (Cicer arietinum L) to Pre and Post Emergence Herbicides

Raghavendra¹,

Gundappagol²

2017

Int.J.Curr.Microbiol.App.Sci

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“…Herbicides may decrease nodulation and nitrogenase activity not only by influencing plant growth but also by affecting rhizobia. Though the herbicides used in the present studies did not adversely affect the growth of rhizobia in vitro at the recommended field application rates (Singh and Wright, 2002), other herbicides need to be tested for their possible adverse effects on rhizobia.…”

Section: Practical Problems Possible Solutions and Future Direction mentioning

confidence: 91%

Effect of weed management on weeds, and on the nodulation, nitrogenase activity, growth and yield of pea (Pisum sativum)

Singh

Wright

2006

Acta Agronomica Hungarica

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Effects of one pre-emergence herbicide (terbutryn/terbuthylazine) and one postemergence herbicide (bentazone) along with unweeded and hand-weeded controls on weeds and on the nodulation, nitrogenase activity, nitrogen content, growth and yield of pea (Pisum sativum) were studied. Terbutryn/terbuthylazine was applied pre-emergence @ 1.40, 2.80 and 5.60 kg/ha whereas bentazone was sprayed 6 weeks after sowing @ 1.44, 2.88 and 5.76 kg/h. Terbutryn/terbuthylazine controlled all the weeds very effectively, whereas bentazone did not control some weeds such as Polygonum aviculare, Poa annua and Elymus repens. The herbicides decreased the number of nodules, the dry weight of nodules, the nitrogenase activity, the shoot dry weight, the nitrogen content in the straw and seeds, and the seed yield of peas, the effects generally being higher at higher rates of application. The adverse effects of herbicides on these parameters might be due to their effects on plant growth, as both the herbicides are known to adversely affect photosynthesis. Nitrogenase activity did not correlate well with plant-N content or shoot dry weight. However, there was a strong relationship between plant biomass and plant-N content, which suggests that researchers can rely on these parameters for studying the effects of treatments on nitrogen fixation, rather than measuring nitrogenase activity.

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“…While comparing the sum of mean values of two dose rates of each herbicide independently, the order of toxicity on total biomass production increased in the following order: sulfosulfuron < isoproturon < atrazine < metribuzin. Evaluation of the herbicide effects on legume cultivation is complicated because herbicide may not only affect the rhizobia in the free living state in soil and within root tissues but also affect plant growth (Singh and Wright, 2002). In the present study, the trend observed, suggests that the lower rate (200 µg.a.i.kg -1 ) in general, had little effect on the growth of the test plants suggesting that herbicides at this rate persisted in soil for only a short duration, after which the viable cells of Bradyrhizobium recovered and multiplied rapidly leading thereby to the establishment of an effective symbiosis with the host plant.…”

Section: Micmentioning

confidence: 99%

Biotoxic effects of the herbicides on growth, seed yield, and grain protein of greengram

Khan¹,

Chaudhry²,

Wani³

et al. 2006

Journal of Applied Sciences and Environmental Management

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ABSTRACT:We studied the effects of atrazine, isoproturon, metribuzin and sulfosulfuron on plant vigour, nodulation, chlorophyll content, seed yield and protein content in seeds, in greengram inoculated with Bradyrhizobium sp. (vigna). The pre-emergence application of the four herbicides at 400 µg kg -1 of soil adversely affected the measured parameters. The average maximum increase of 10 % in seed yield occurred at 200 µg kg -1 of sulfosulfuron, while atrazine at 200 and 400 µg kg -1 of soil decreased the seed yield by 25 % and 40%, respectively. The average maximum chlorophyll content of 1.2 mg g -1 was obtained at 200 µg kg -1 of sulfosulfuron which declined consistently for all herbicides and increasing dose rates. Sulfosulfuron at 200 µg kg -1 increased the number of nodules found per plant by 7 % at 45 days after seeding the greengram. In contrast, the tested dose rates of atrazine, isoproturon and metribuzin significantly reduced the nodulation (nodule number and dry mass). The average maximum grain protein of 182 mg g -1 was obtained for sulfosulfuron at 400 µg kg -1 , while minimum grain protein was obtained at 400 µg kg -1-of isoproturon (124 mg g -1 ) and atrazine (125 mg g -1 ) application. Among the herbicides tested, atrazine and metribuzin showed a large degree of phytotoxicity to the crop, inhibiting its vegetative growth and was thus incompatible with greengram. @JASEM

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In vitro studies on the effects of herbicides on the growth of rhizobia

Cited by 49 publications

References 16 publications

Nodulation and Yield Response of Chickpea (Cicer arietinum L) to Pre and Post Emergence Herbicides

Nodulation and Yield Response of Chickpea (Cicer arietinum L) to Pre and Post Emergence Herbicides

Effect of weed management on weeds, and on the nodulation, nitrogenase activity, growth and yield of pea (Pisum sativum)

Biotoxic effects of the herbicides on growth, seed yield, and grain protein of greengram

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