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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00027073%3A_____%2F16%3AN0000084" target="_blank" >RIV/00027073:_____/16:N0000084 - isvavai.cz</a>

Result on the web

<a href="http://www.sisef.it/iforest/contents/?id=ifor1458-008" target="_blank" >http://www.sisef.it/iforest/contents/?id=ifor1458-008</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3832/ifor1458-008" target="_blank" >10.3832/ifor1458-008</a>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

GF - Diseases, pests, weeds and plant protection

OECD FORD branch

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Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

iForest–Biogeosciences and Forestry

ISSN

1971-7458

e-ISSN

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Volume of the periodical

9

Issue of the periodical within the volume

FEB 2016

Country of publishing house

IT - ITALY

Number of pages

8

Pages from-to

146-153

UT code for WoS article

000372128100001

EID of the result in the Scopus database

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