http://www.cnr.it/ontology/cnr/individuo/prodotto/ID310425
Root growth and AM colonization dynamics in rice plants under flooding and dry conditions. (Abstract/Poster in convegno)
- Type
- Label
- Root growth and AM colonization dynamics in rice plants under flooding and dry conditions. (Abstract/Poster in convegno) (literal)
- Anno
- 2012-01-01T00:00:00+01:00 (literal)
- Alternative label
Fiorilli V., Vallino M., Marziano E., Bonfante P. (2012)
Root growth and AM colonization dynamics in rice plants under flooding and dry conditions.
in 56° Annual Congress Società Italiana Genetica Agraria (SIGA), Perugia, 17/20 Settembre 2012
(literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- Fiorilli V., Vallino M., Marziano E., Bonfante P. (literal)
- Note
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- Fiorilli V. - assegnista ex IPP nel 2012, ora Dipartimento di Biologia dei Sistemi - Università degli Studi di Torino
Marziano E., Bonfante P. - Dipartimento di Biologia dei Sistemi - Università degli Studi di Torino (literal)
- Titolo
- Root growth and AM colonization dynamics in rice plants under flooding and dry conditions. (literal)
- Abstract
- As one of the most important food source for humans, rice has a relevant social and economic
role worldwide. Understanding rice responses to the interaction with arbuscular mycorrhizal
(AM) fungi has gained increasing importance in order to enhance plant yield. While it is known
that AM fungi do not preferentially colonize flooded roots, the mechanisms which control this
phenomenon remain largely unknown. The goal of our work is to elucidate, through
morphological and molecular approaches, the factors which control colonization dynamics of
rice roots by AM fungi in different water regimes such as flooding and dry conditions.
Using controlled growth systems, two sets of mycorrhizal and control rice plants were grown in
both water regimes, considering also the transfer from water to dry and viceversa. Roots from all
biological conditions were sampled at different time points, starting from 7 dpi (days after
inoculation with Glomus intraradices) to 35 dpi. We evaluated both morphological and
molecular parameters, such as root branching (the ratio between the number of large lateral roots
and the crown ones), the mycorrhizal colonization level, and the expression of plant and fungal
functional marker genes. As expected, mycorrhizal colonization decreased with flooding, while
differences on root anatomy between dry and flooding conditions started from 7 dpi, leading to a
more important branching under dry conditions. In mycorrhizal plants, root branching was
significantly higher as a consequence of the fungal presence added to the effect of the dry soil. In
addition, the root apparatus of plants shifted from the water condition to the dry rapidly adapted
to the new condition revealing a high organ plasticity. Quantitative real time PCRs performed on
plant and fungal P and N transporters revealed that symbiosis functionality was directly linked
to the root anatomy and the success of mycorrhizal colonization. However, even if reduced, the
expression of fungal P and N transporters was maintained also in the flooding condition.
In conclusion, our experiments demonstrate that the water regime influences the fungal
colonization, and therefore the expression of symbiosis marker genes, first modifying root
morphology. (literal)
- Prodotto di
- Autore CNR
- Insieme di parole chiave
Incoming links:
- Prodotto
- Autore CNR di
- Insieme di parole chiave di