The community of needle endophytes reflects the current physiological state of Norway spruce
| Autor: | Taina Pennanen, Sannakajsa Velmala, Tiina Rajala, Risto Vesala, Aino Smolander |
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| Rok vydání: | 2014 |
| Předmět: |
Facultative
biology Host (biology) Molecular Sequence Data Picea abies Sequence Analysis DNA Lophodermium piceae biology.organism_classification Biota Endophyte Plant Leaves Cutting Infectious Diseases Botany Endophytes Genetics Species richness Picea DNA Fungal Ecology Evolution Behavior and Systematics |
| Zdroj: | Fungal Biology. 118:309-315 |
| ISSN: | 1878-6146 |
| Popis: | This study investigated fungal endophytes in the needles of Norway spruce (Picea abies) cuttings in relation to host tree growth. We also determined the prevalence of endophytes in needles incubated for six months. The cuttings originated from clonal origins showing slow- and fast-growth in long-term field trials but the heritable differences in growth rate were not yet detected among the studied cutting. Endophytes were isolated from surface-sterilized needles with culture-free DNA techniques. No significant differences were observed between endophyte communities of slow- and fast-growing clonal origins. However, the endophyte community correlated with the current growth rate of cuttings suggesting that endophytes reflect short- rather than long-term performance of a host. The concentration of condensed tannins was similar in slow- and fast-growing clonal origins but it showed a negative relationship with endophyte species richness, implying that these secondary compounds may play an important role in spruce tolerance against fungal infections. More than a third of endophyte species were detected in both fresh and decomposing needles, indicating that many needle endophytes are facultative saprotrophs. Several potentially pathogenic fungal species were also found within the community of saprotrophic endophytes. |
| Databáze: | OpenAIRE |
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