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Diversity of arbuscular mycorrhizal fungi in Tectona grandis Linn.f. plantations and their effects on growth of micropropagated plantlets
Regeneration of stands of valuable tropical hardwood tree species for sustainable harvest requires production of seedlings with high probabilities of survival. One way to enhance the vigor of plants for outplanting is pre-colonization of roots by arbuscular mycorrhizal (AM) fungi. We pursued the str...
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Published in: | New forests 2017-07, Vol.48 (4), p.547-562 |
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Main Authors: | , , , |
Format: | Article |
Language: | English |
Subjects: | |
Citations: | Items that this one cites Items that cite this one |
Online Access: | Get full text |
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Summary: | Regeneration of stands of valuable tropical hardwood tree species for sustainable harvest requires production of seedlings with high probabilities of survival. One way to enhance the vigor of plants for outplanting is pre-colonization of roots by arbuscular mycorrhizal (AM) fungi. We pursued the strategy that the most promising AM fungus candidates for inoculation would be those associated with the tree of interest in the field. AM fungus communities were assessed in five plantations of
Tectona grandis
Linn.f. A total of 18 AM fungal morphotypes were found, representing four families:
Glomeraceae
(49.6%),
Acaulosporaceae
(24.9%),
Claroideoglomeraceae
(20.8%), and
Gigasporaceae
(4.8%). AM fungus spore density was negatively correlated with soil organic carbon. Some of these AM fungi, plus
Rhizophagus irregularis
, were established in pot culture and in vitro with transformed carrot roots, and subsequently used to inoculate micropropagated plantlets of
T. grandis
.
Tectona grandis
plantlets inoculated in vitro were successfully colonized by all AM fungi studied. Plants inoculated with
Funneliformis mosseae
were taller than uninoculated plants.
Tectona grandis
plantlets inoculated with the AM fungus
Claroideoglomus etunicatum
PBT03 were taller than uninoculated controls in
ex vitro
experiments. This study provides early insight for the targeted use of the AM symbiosis in production of important tree species in future greenhouse studies and reforestation. |
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ISSN: | 0169-4286 1573-5095 |
DOI: | 10.1007/s11056-017-9584-6 |