Melampsora larici-populina, the main rust pathogen, causes loss in biomass production of black cottonwood plantations in the south of China

Wan, Zhibing; Li, Yiran; Chen, Ying-Nan; Zhang, Xinye; Guan, Hao; Yin, Tongming

doi:10.1007/s12600-013-0294-0

Cited by 15 publications

(10 citation statements)

References 23 publications

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“…The main pathogens restricting poplar growth in natural systems as well as in plantations all over the world are rust fungi. In particular, Melampsora larici-populina has enormous ecological and economic importance as a result of its wide distribution and significance in biomass reduction (Benetka et al, 2011;Wan et al, 2013). Another naturally occurring antagonist of poplar trees is the gypsy moth, Lymantria dispar.…”

Section: Introductionmentioning

confidence: 99%

Leaf rust infection reduces herbivore‐induced volatile emission in black poplar and attracts a generalist herbivore

et al. 2017

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Plants release complex volatile blends after separate attack by herbivores and pathogens, which play many roles in interactions with other organisms. Large perennials are often attacked by multiple enemies, but the effect of combined attacks on volatile emission is rarely studied, particularly in trees. We infested Populus nigra trees with a pathogen, the rust fungus Melampsora larici-populina, and Lymantria dispar caterpillars alone and in combination. We investigated poplar volatile emission and its regulation, as well as the behavior of the caterpillars towards volatiles from rust-infected and uninfected trees. Both the rust fungus and the caterpillars alone induced volatile emission from poplar trees. However, the herbivore-induced volatile emission was significantly reduced when trees were under combined attack by the herbivore and the fungus. Herbivory induced terpene synthase transcripts as well as jasmonate concentrations, but these increases were suppressed when the tree was additionally infected with rust. Caterpillars preferred volatiles from rust-infected over uninfected trees. Our results suggest a defense hormone crosstalk upon combined herbivore-pathogen attack in poplar trees which results in lowered emission of herbivore-induced volatiles. This influences the preference of herbivores, and might have other far-reaching consequences for the insect and pathogen communities in natural poplar forests.

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Section: Introductionmentioning

confidence: 99%

Leaf rust infection reduces herbivore‐induced volatile emission in black poplar and attracts a generalist herbivore

et al. 2017

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“…This rust completes its life cycle on two different hosts (poplar as the telial host and larch as the aecial host) and successively produces five types of spores, including pycniospores, aeciospores, urediniospores, teliospores and basidiospores (Hacquard et al 2011;Cao et al 2000). The poplars that are widely distributed throughout the Northern Hemisphere are commonly used in the plant science community as model trees and recently have received increasing attention as a renewable source of biomass for the energy, lumber and pulping industries (Wan et al 2013;Duplessis et al 2009). As the most devastating and widespread pathogen of poplars, M. larici-populina restricts the use of these trees for environmental and wood production in many parts of the world (Steenackers et al 1996).…”

Section: Introductionmentioning

confidence: 99%

Molecular characterization of a Hog1-type MAPK, MlpHog1, from Melampsora larici-populina

et al. 2016

Phytoparasitica

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The obligate biotrophic fungus Melampsora larici-populina (Mlp) causes devastating poplar foliar rust disease. In pathogens, the Hog1-type mitogen-activated protein kinase (MAPK) gene is involved in both pathogenesis and the response to various stresses, including osmotic stress. However, there are few reports on its role in M. larici-populina. In the present study, we identified and characterized the Hog1-type MAPK gene, MlpHog1, in M. larici-populina. The MlpHog1 protein consists of 356 amino acids and contains a conserved TGY motif. The function of MlpHog1 was probed by mutant complementation studies. Expression of MlpHog1 could partially complement the osmoregulation, sexual reproduction and pathogenicity defects of the Fusarium graminearum Hog1 mutant and largely rescued the response of the mutant to cytoplasm membrane and oxidative stresses. These observations suggest that MlpHog1 may play a role in the infectious growth of M. larici-populina and the response of the fungus to various environmental stresses.

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“…Poplar leaf rust, one of the most serious diseases that affect poplars, caused by the biotrophic rust fungus Melampsora larici-populina (MLP), leads to dramatic economic and ecological losses in poplar plantations, worldwide (Covarelli et al, 2013;Wan et al, 2013). During the last decades, breeding resistant poplar was considered an effective and environment-friendly approach to control this disease or to alleviate damage caused by it.…”

Section: Introductionmentioning

confidence: 99%

Cloning and characterization of defense-related genes from Populus szechuanica infected with rust fungus Melampsora larici-populina

Z-D

et al. 2016

Genet. Mol. Res.

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ABSTRACT. Characterization of defense-related genes is critical for breeding disease-resistant poplar varieties and for better management and control of leaf rust disease. In the present study, full-length cDNAs of five Populus szechuanica defense-related (PsDR) genes, pathogen-related protein 1 (PsPR1), β-1,3-glucanase (PsGns), thaumatin-like protein 1 (PsTLP1), thaumatin-like protein 2 (PsTLP2), and phenylalanine ammonialyase (PsPAL), were cloned from the leaves of P. szechuanica infected with Melampsora larici-populina (MLP). PsPR1 (728 bp), PsGns (1189 bp), PsTLP1 (929 bp), PsTLP2 (885 bp), and PsPAL (2586 bp) were predicted to encode 161, 347, 245, 225, and 711 amino acid residue-containing proteins with isoelectric points of 8. 53, 4.96, 4.51, 7.32, and 5.87, respectively. Moreover, the deduced PsDR proteins displayed more than 90% similarity to proteins from other Populus species. In response to the avirulent isolate, Sb 052 , and the virulent isolate, Th 053 , of MLP, the expression of PsDR genes was rapidly up-regulated in the leaves of P. szechuanica, peaked at 2 or 7 days post-inoculation (dpi), with levels in the incompatible interaction being higher than those in the compatible interaction. Meanwhile, the expression of PsDR genes (except for PsGns) was also differentially up-regulated at 3, 7, or 18 dpi in the petioles of the infected leaves, leaves next to the inoculated leaves, and in the top buds of the infected plants, respectively, compared to that at 0 dpi. These results suggest that these PsDR genes could play distinctive roles in the defense response of poplar against rust infection.

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Melampsora larici-populina, the main rust pathogen, causes loss in biomass production of black cottonwood plantations in the south of China

Cited by 15 publications

References 23 publications

Leaf rust infection reduces herbivore‐induced volatile emission in black poplar and attracts a generalist herbivore

Leaf rust infection reduces herbivore‐induced volatile emission in black poplar and attracts a generalist herbivore

Molecular characterization of a Hog1-type MAPK, MlpHog1, from Melampsora larici-populina

Cloning and characterization of defense-related genes from Populus szechuanica infected with rust fungus Melampsora larici-populina

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