Effect of Melampsora larici-populina on growthand biomass yield of eight clones of Populus nigra

Benetka, V.; Černý, K.; Pilarova, P.; Kozlíková, K.

doi:10.17221/51/2010-jfs

Cited by 7 publications

(7 citation statements)

References 13 publications

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“…As a result, we confirmed the presence of virulence 2, 3, 4, 5 and 7, as previously reported (Barrès et al 2008, Benetka et al 2011). Virulence 1, 6, and 8 were not identified.…”

Section: Discussionsupporting

confidence: 91%

“…Some clones exhibited an absence of growth parameter reduction, however other clones showed notably high reductions. Infected genotypes with MLP tolerance were also recorded, according to Benetka et al (2011).…”

Section: Discussionmentioning

confidence: 99%

“…(MLP) resistance were derived from our own breeding program using P. nigra (Benetka et al 2012). Two clones (98/7 a 97/152) were employed in previous trials (Benetka et al 2011). Parental trees were found in a natural environment; crosses were made between parental individuals from different natural climatic and geographic conditions.…”

Section: Methodsmentioning

confidence: 99%

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Variation in resistance to the rust fungus Melampsora larici-populina Kleb. in Populus nigra L. in the Czech Republic

Štochlová¹,

Novotná²,

Benetka³

2016

iForest

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Differences in Populus nigra L. clone resistance to the rust fungus Melampsora larici-populina Kleb. (MLP) were studied in field trials where infected trees were compared with fungicide-protected trees. MLP rust infections were assessed using a 6-point scale. Four parameters of poplar growth were also measured to gauge host response to infection: shoot thickness, shoot number at the end of the growing season, individual plant dry weight, and dry matter yield per unit area. Five of eight known pathogen virulence types were detected. Cumulative growth in shoot thickness in sprayed and unsprayed plots was similar in clones with high rust pathogen resistance, but significantly different in clones with low resistance. Clones with low resistance also exhibited delayed growth initiation in the year following infection, an effect attributed to lower food storage accumulated during the previous year, reflected in a reduction in stem diameter. Based on stem thickness measurements, it was confirmed growth ceased at the end of August. Average rust severity symptoms ranged from 2.75 to 4.22 on the 6-point scale. The percentage reduction for the various growth parameters resulting from rust infection ranged as follows: individual plant dry weight 5-64%; dry matter yield 21-66%; shoot number 17-46%; and stem diameter 1-35%. Exclusive of stem diameter, these reductions correlated with severity in MLP rust infection. The one exception was tolerance to rust infection displayed by one of the clones. Clones with the lowest growth reductions were 97/152 and 97/157. Growth and yield parameter variation as a result MLP resistance difference was observed among tested P. nigra clones. This variation can be viewed as confirmation that resistance observed in this study and P. nigra clones is a suite of quantitative traits. These findings have important implications for MLP resistance breeding programs.

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“…As a result, we confirmed the presence of virulence 2, 3, 4, 5 and 7, as previously reported (Barrès et al 2008, Benetka et al 2011). Virulence 1, 6, and 8 were not identified.…”

Section: Discussionsupporting

confidence: 91%

Section: Discussionmentioning

confidence: 99%

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Variation in resistance to the rust fungus Melampsora larici-populina Kleb. in Populus nigra L. in the Czech Republic

Štochlová¹,

Novotná²,

Benetka³

2016

iForest

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“…These correlations could be used to estimate DMIP and biomass yields during the selection process in breeding programs, when the first selection is made on the basis of visual assessments. However, breeding programs must also take into account resistance to important diseases, principally the leaf rust Melampsora larici-populina, which can significantly lower final yields (Benetka et al 2011a) with its damaging effects on plant growth (Nelson et al 1981), affecting the amount of light penetrating the canopy and so the competition among plants.…”

Section: Discussionmentioning

confidence: 99%

Biomass production of Populus nigra L. clones grown in short rotation coppice systems in three different environments over four rotations

Benetka¹,

Novotná²,

Štochlová³

2014

iForest

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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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Effect of Melampsora larici-populina on growthand biomass yield of eight clones of Populus nigra

Cited by 7 publications

References 13 publications

Variation in resistance to the rust fungus Melampsora larici-populina Kleb. in Populus nigra L. in the Czech Republic

Variation in resistance to the rust fungus Melampsora larici-populina Kleb. in Populus nigra L. in the Czech Republic

Biomass production of Populus nigra L. clones grown in short rotation coppice systems in three different environments over four rotations

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

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