Defence responses in leaves of resistant and susceptible melon (Cucumis melo L.) cultivars infected with Colletotrichum lagenarium

Ge, Yonghong; Bi, Yang; Guest, David

doi:10.1016/j.pmpp.2012.09.002

Cited by 41 publications

(30 citation statements)

References 58 publications

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“…Debona et al (2012) reported a higher efficiency of the antioxidant system due to an increase in the activities of the enzymes SOD, CAT, POX, APX, GST and GR, which reduced the level of ROS generated during the infection process of Pyricularia oryzae on wheat leaves, which was associated with wheat resistance to leaf blast. Ge et al (2013) also reported that APX and GR as well as GSH and AsA contributed to melon resistance to Colletotrichum lagenarium. In summary, the results of this study led to the conclusion that Si impaired soybean resistance to FLS, which was most likely due to less than optimal conditioning of the antioxidant system.…”

Section: Discussionmentioning

confidence: 92%

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Silicon‐Induced Changes in the Antioxidant System Reduce Soybean Resistance to Frogeye Leaf Spot

Nascimento

Debona

Silveira

et al. 2016

Journal of Phytopathology

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Frogeye leaf spot (FLS), caused by the fungus Cercospora sojina, is one of the most important soybean diseases and can cause great yield losses. Several studies have demonstrated that silicon (Si) enhances the plant antioxidant system, especially when they are subjected to stresses. Thus, this study was designed to evaluate the effect of Si on soybean resistance to FLS, on the antioxidant system, on the concentration of reactive oxygen species and on cellular damage during the infection process of C. sojina. Plants from cultivars Bossier and Conquista, susceptible and resistant to FLS, respectively, were supplied with either 0 (−Si) or 2 mm (+Si) and non‐inoculated or inoculated with C. sojina. FLS severity was greater for Bossier than for Conquista, regardless of the Si supply, and it was increased by Si for both cultivars. The activities of the most antioxidant enzymes were lower in the +Si plants than in the −Si plants when they were not inoculated. Inoculated plants usually showed an increased enzyme activities and higher concentrations of ascorbate and reduced glutathione than did the non‐inoculated plants, regardless of Si supply. At advanced stages of fungal infection, the +Si‐inoculated plants from Bossier had higher activity of most antioxidant enzymes and higher concentrations of superoxide and malondialdehyde compared to the non‐inoculated plants as a result of an increased oxidative stress. The results from this study provide the first evidence that Si reduces the basal activity of antioxidant enzymes in soybean leaves leading to an increase in host susceptibility to FLS.

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Section: Discussionmentioning

confidence: 92%

“…Ge et al. () also reported that APX and GR as well as GSH and AsA contributed to melon resistance to Colletotrichum lagenarium .…”

Section: Discussionmentioning

confidence: 95%

Silicon‐Induced Changes in the Antioxidant System Reduce Soybean Resistance to Frogeye Leaf Spot

Nascimento

Debona

Silveira

et al. 2016

Journal of Phytopathology

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“…A variety of PR genes and enzymes were differentially regulated in susceptible and resistant cultivars of many crops inoculated with Colletotrichum spp. Chitinase and b-1,3-glucanase activities dramatically increased in the resistant melon cultivar inoculated by Colletotrichum lagenarium but the activities of both hydrolytic enzymes were not modulated in the susceptible cultivar (Ge et al, 2013). Chitinases and thaumatin-like proteins in the resistant sugarcane cultivar were greater and more rapidly activated by Colletotrichum falcatum infection (Viswanathan et al, 2005).…”

Section: Discussionmentioning

confidence: 99%

Differential defence responses of susceptible and resistant kimchi cabbage cultivars to anthracnose, black spot and black rot diseases

Lee

Hong

2014

Plant Pathology

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The resistance of 27 commercial kimchi cabbage cultivars against Colletotrichum higginsianum causing anthracnose was evaluated. Among the cultivars with different disease severity, three cultivars, CR‐Hagwang, CR‐Hwangrock and Houseking‐125, showed moderate resistance. Two cultivars, Buram‐3‐ho (susceptible) and CR‐Hagwang (moderate resistance), were chosen for further investigation. Severe necrotic lesions were observed on the C. higginsianum‐inoculated leaves in cv. Buram‐3‐ho, whereas only a few scattered spot lesions were formed on the inoculated leaves of cv. CR‐Hagwang. Interestingly, similar susceptibility and resistance were shown in both cultivars when inoculated by fungal (Alternaria brassicicola) or bacterial (Xanthomonas campestris pv. campestris) pathogens causing black spot or black rot disease, respectively. Pathogenesis‐related (PR) gene expression was analysed during resistant and susceptible responses to anthracnose, black spot and black rot diseases. Semiquantitative RT‐PCR analysis revealed that the transcriptional activation of PR1, BGL2, Chi1, PR4, VSP2, LOX2 and GST1 were differentially regulated in the kimchi leaves during resistant, as compared to susceptible, responses. In addition, the PR gene expression was regulated by defence‐related hormones salicylic acid, jasmonic acid and ethylene. Taken together, these results suggest that differential defence signalling crosstalk and PR gene expression are involved in cultivar‐specific resistance of kimchi cabbage plants to anthracnose, black spot and black rot diseases, and that resistance is strongly associated with the hormone‐dependent transcriptional induction of defence genes.

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“…Enhancement of PAL activities was reported in response to Rhizoctonia solani inoculation in cowpea pretreated with SA [38]. PAL activity increased in inoculated leaves of the resistant melon cultivar, resulting in extensive and locally intense deposition of phenolic compounds and lignin surrounding epidermal cells [39]. Addition of 20 μ M salicylic acid to Saussurea medusa cell cultures resulted in 7.5-fold increase in PAL activity [40].…”

Section: Discussionmentioning

confidence: 99%

Elicitor‐Induced Defense Responses in Solanum lycopersicum against Ralstonia solanacearum

Mandal

Kar

Mukherjee

et al. 2013

The Scientific World Journal

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We investigated on important parameters of induced resistance in hydroponic tomato (Solanum lycopersicum) against Ralstonia solanacearum using the elicitors chitosan (CHT), salicylic acid (SA), and jasmonic acid (JA). The increase in total phenolic content of roots by the elicitors was significantly higher than control. Most pronounced increase in lignin synthesis was triggered by SA followed by CHT. At 24 h post-elicitation (hpe), the activity of phenylalanine ammonia lyase was 4.5 times higher than control elicited by CHT. The peroxidase activity was about 86 nkat/mg protein at 24 hpe in case of SA and 78 nkat/mg protein in case of CHT. The activity of polyphenol oxidase increased several folds by the elicitors. Cinnamyl alcohol dehydrogenase activity increased to the maximum at 48 hpe under the influence of CHT. The results indicate that the elicitors SA and CHT induced effective defense responses in tomato plants against R. solanacearum. This was evident from reduced vascular browning and wilting symptoms of tomato plants treated with SA and CHT and challenged subsequently with R. solanacearum. This reduced disease incidence in tomato by SA and CHT may be a result of cell wall strengthening through deposition of lignin and the coincident induction of defense enzymes.

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Defence responses in leaves of resistant and susceptible melon (Cucumis melo L.) cultivars infected with Colletotrichum lagenarium

Cited by 41 publications

References 58 publications

Silicon‐Induced Changes in the Antioxidant System Reduce Soybean Resistance to Frogeye Leaf Spot

Silicon‐Induced Changes in the Antioxidant System Reduce Soybean Resistance to Frogeye Leaf Spot

Differential defence responses of susceptible and resistant kimchi cabbage cultivars to anthracnose, black spot and black rot diseases

Elicitor‐Induced Defense Responses in Solanum lycopersicum against Ralstonia solanacearum

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