Fungicide resistance and analysis of genetic variation of sclerotinia stem rot in Brassica napus L.

2021 ◽  
Vol 33 (3) ◽  
pp. 281-287
Author(s):  
Jin Cheon Park ◽  
Um Ji Hwang ◽  
Kwang Soo Kim ◽  
Tae Hwa Kim ◽  
Won Park ◽  
...  
Keyword(s):  
Genetic Variation ◽  
Brassica Napus ◽  
Fungicide Resistance ◽  
Stem Rot ◽  
Sclerotinia Stem Rot

GENETIC VARIATION IN REACTION TO SCLEROTINIA STEM ROT IN Brassica SPECIES

1989 ◽  
Vol 69 (1) ◽  
pp. 229-232 ◽  
Author(s):  
F. S. SEDUN ◽  
G. SEGUIN-SWARTZ ◽  
G. F. W. RAKOW
Keyword(s):  
Genetic Variation ◽  
Sclerotinia Sclerotiorum ◽  
Brassica Campestris ◽  
Brassica Species ◽  
Stem Rot ◽  
Stem Tissue ◽  
Sclerotinia Stem Rot ◽  
Selection Technique ◽  
Resistance Selection ◽  
Stem Lesion

Twenty-five cultivars and strains representing five Brassica species were tested under controlled conditions for their reaction to infection by Sclerotinia sclerotiorum, the causal agent of sclerotinia stem rot. Using the rate of stem lesion expansion as an indicator of the resistance of stem tissue to the pathogen, significant differences were present between species and among cultivars/strains within species. Although S0 parent-S1 progeny heritability of stem lesion expansion was low, S0 plants of Brassica campestris and B. juncea with increased sclerotinia stem rot resistance could be selected.Key words: Brassica, Sclerotinia sclerotiorum, stem rot resistance, selection technique

scholarly journals Detection of Sclerotinia Stem Rot on Oilseed Rape (Brassica napus L.) Leaves Using Hyperspectral Imaging

Sensors ◽  
2018 ◽  
Vol 18 (6) ◽  
pp. 1764 ◽  
Author(s):  
Wenwen Kong ◽  
Chu Zhang ◽  
Feng Cao ◽  
Fei Liu ◽  
Shaoming Luo ◽  
...  
Keyword(s):  
Brassica Napus ◽  
Hyperspectral Imaging ◽  
Oilseed Rape ◽  
Stem Rot ◽  
Sclerotinia Stem Rot ◽  
Brassica Napus L

Lignin composition and timing of cell wall lignification are involved in Brassica napus resistance to Sclerotinia sclerotiorum stem rot

2021 ◽  
Author(s):  
Andreas von Tiedemann ◽  
Birger Koopmann ◽  
Kerstin Hoech
Keyword(s):  
Cell Wall ◽  
Brassica Napus ◽  
Sclerotinia Sclerotiorum ◽  
Plant Defence ◽  
Phenylpropanoid Pathway ◽  
Stem Rot ◽  
Phenylpropanoid Metabolism ◽  
Sclerotinia Stem Rot ◽  
Cell Wall Modification ◽  
Lignin Deposition

Sclerotinia stem rot (SSR) is an economically and globally significant disease in oilseed rape (Brassica napus L.) caused by the necrotrophic ascomycete Sclerotinia sclerotiorum. This study explored the role of cell wall reinforcement by lignin as a relevant factor for effective plant defence against attack of this pathogen. Expression of key genes in the phenylpropanoid pathway and the induced synthesis of lignin in infected stem tissues were investigated in a study comparing a susceptible (Loras) and a moderately resistant cultivar (Zhongyou 821, ZY821). Data revealed an earlier and more rapid defence activation in ZY821 through up-regulation of transcript levels of genes related to key steps in the phenylpropanoid pathway associated with enhanced lignin deposition in the resistant B. napus genotype. Expression level of BnCAD5, encoding a cinnamyl alcohol dehydrogenase, responsible for conversion of monolignol to lignin, was more rapidly up-regulated in ZY821 than Loras. The similar expression pattern of BnCAD5 and the gene BnF5H, encoding for the ferulate-5-hydroxylase which catalyses the synthesis of syringyl (S) lignin precursors, suggests that BnCAD5 is involved in the S lignin formation. Histological observations confirmed these results, showing an earlier increase of S lignin deposition in the infected resistant genotype. Deposition of guaiacyl (G) lignin was detected in both genotypes and is thus considered a component of basal, cultivar-independent defence response of B. napus to stem rot. The results indicate the importance of cell wall modification for quantitative stem rot resistance by responses in the phenylpropanoid metabolism generating distinct lignin types on different temporal scales.

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