Effect of root-knot and reniform nematodes on plant growth and bulk-density of plant residues of pigeonpea

Anver, Suhail; Alam, Maroof

doi:10.1016/0269-7483(89)90053-0

Cited by 2 publications

(4 citation statements)

References 2 publications

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“…However, we are unsure if the reduced RN pressure contributed to greater early-season vigor in resistant genotypes compared to susceptible genotypes because the interaction effects of genotype by reniform nematode were not observed for cotton morphological parameters. This is in contrast with the results of Anver and Alam [31], who reported less of a decline in growth and development characteristics in resistant cultivars when compared to susceptible cultivars in pigeon pea (Cajanuscajan). The species or genus-specific responses to RN damage could be one of the reasons for the contrasting results.…”

Section: Discussioncontrasting

confidence: 99%

“…The damage from RN on growth and physiological traits of cotton genotypes were not observed at emergence and 30 DAP, except for ΦPSII, whichwas, however, not biologically significant. The present study results gree with past greenhouse studies [24,26,29,31] conducted under the pure RN environment. We observed RN damage such as reduced shoot to root ratio and leaf area andfewer secondary roots in susceptible cotton cultivars at 60 DAP.…”

Section: Discussionsupporting

confidence: 90%

“…Similarly, Thakar and Yadav [30] confirmed that increased root phenolics in pigeon pea (Cajanuscajan) were associated with resistance to the reniform nematode. Additional reports noted variable growth responses among reniform nematode-resistant and -susceptible cultivars to reniform nematode damage in agronomic crops such as pigeon pea [31] and cotton [27]. While the evaluation of RN-resistant lines has mostly been based on nematode development and fecundity [32][33][34], assessment of morphological and physiological response to reniform nematode offers another approach to verifying resistance.…”

Section: Introductionmentioning

confidence: 99%

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EarlySeason Morphological and Physiological Responses of Resistant and Susceptible Cotton Genotypes to Reniform Nematode and Soil Nitrogen

et al. 2020

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Soil fertility and reniform nematode (RN) directly affect earlyseason growth and physiology of cotton. The growth responses to soil fertility and RN may, however, vary across germplasm. A greenhouse study was conducted to gain information on the role that host plant resistance plays in influencing RN populations, and cotton growth and physiological response to a range of soil nitrogen (N) levels in the presence and absence of RN. RN-resistant cotton lines (08SS110-NE06.OP and 08SS100) along with susceptible cultivars (Deltapine 16 and PHY 490 W3FE) were subjected to four levels of N from planting until biomass harvesting, 60 days after planting(DAP), under the presence orabsence of RN. The linear and quadratic functions (r2 = 0.72 to 0.99) bestdescribed measured responses of cotton genotypes to soil N. However, the responses were not different among genotypes, except for plant height at 30 DAP. This study revealed significant increases in several morphological parameters with increasing rates of N. RN population in the pots grown with resistant lines was lower whencompared to susceptible cultivars at biomassharvest. Physiological responses indicated that 08SS110-NE06.OP was more resilient to RN stress than other genotypes. The information from this study could be useful in managing the early season growth of cotton.

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Section: Discussioncontrasting

confidence: 99%

Section: Discussionsupporting

confidence: 90%

Section: Introductionmentioning

confidence: 99%

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EarlySeason Morphological and Physiological Responses of Resistant and Susceptible Cotton Genotypes to Reniform Nematode and Soil Nitrogen

et al. 2020

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“…More interesting, it has been recently found that A. tumefaciens isolate, isolated from nodules of plants growing in zinc-lead mine tailings, showed high metal resistance and enhanced the growth of plants in a metal-contaminated environment (Hao et al 2012). On the other hand, M. incognita decreased the plants growth, causing loss in plant parameters that may be directly correlated with the multiplication of the nematodes (Anver and Alam 1989). The results herein showed that A. tumefaciens caused an increment in all plant parameters compared to the negative control and healthy plants, while M. incognita decreased all plant parameters than the healthy plants.…”

Section: Effect Of Hcn-producing Rhizobacteria On Growth Parameters Omentioning

confidence: 61%

Influence of hydrogen cyanide-producing rhizobacteria in controlling the crown gall and root-knot nematode, Meloidogyne incognita

El-Rahman

Shaheen

El-Aziz

et al. 2019

Egypt J Biol Pest Control

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Out of 39 isolates of rhizobacteria, recovered from economic plants grown in 8 locations in Egypt, 6 isolates were able to produce Hydrogen Cyanide (HCN). 16S rRNA sequence analysis identified these isolates as: Pseudomonas japonica strain NBRC 103040, Bacillus megaterium strain CtST3.5, Pseudomonas sp. strain Gamma-81, P. tolaasii strain ATCC 33618, P. chlororaphis strain Lzh-T5, and P. mosselii strain CV25. These HCN producers were able to inhibit growth of Agrobacterium tumefaciens and affect viability of Meloidogyne incognita juveniles in vitro. The isolates of P. japonica and Pseudomonas sp. Gamma-81 prevented the gall formation on tomato plants by A. tumefaciens, regardless of the presence of M. incognita. The isolates of B. megaterium, P. chlororaphis, P. tolaasii, and P. mosselii decreased the weight and number of galls produced by A. tumefaciens in the presence or absence of M. incognita. The 6 HCN producers decreased the population of M. incognita and the number of nematode galls than the positive control, when used against M. incognita. A similar effect was achieved against mixed infections with M. incognita and A. tumefaciens. The HCN-producing rhizobacteria, in the presence of A. tumefaciens and/or M. incognita, caused obvious increment in all growth parameters of tomato than the negative control and healthy plants. The only exception was found in case of Pseudomonas sp. Gamma-81 against M. incognita and against mixed infection, where growth parameters of tomato were decreased. Although the isolates were naturally isolated from the rhizosphere of economic plants, it must be cautiously considered since the isolate identified as P. japonica has been reported as a human pathogen. Also, P. tolaasii was reported causing a bacterial blotch on cultivated mushrooms under certain environmental conditions. Further investigations are needed.

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Effect of root-knot and reniform nematodes on plant growth and bulk-density of plant residues of pigeonpea

Cited by 2 publications

References 2 publications

EarlySeason Morphological and Physiological Responses of Resistant and Susceptible Cotton Genotypes to Reniform Nematode and Soil Nitrogen

EarlySeason Morphological and Physiological Responses of Resistant and Susceptible Cotton Genotypes to Reniform Nematode and Soil Nitrogen

Influence of hydrogen cyanide-producing rhizobacteria in controlling the crown gall and root-knot nematode, Meloidogyne incognita

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