Inherited maternal effects on the drought tolerance of a natural hybrid aquatic plant, Potamogeton anguillanus

We tested whether maternal effects have led to the adaptive divergence of strains of the natural hybrid Potamogeton anguillanus, whose putative parents show contrastingly divergent ecologies. To examine the correlation between phenotypic characters and maternal types, we conducted drought experiment...

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Bibliographic Details
Published in:Journal of plant research 2007-07, Vol.120 (4), p.473-481
Main Authors: Iida, S.(Kobe Univ. (Japan). Research Center for Environmental Genomics), Yamada, A, Amano, M, Ishii, J, Kadono, Y, Kosuge, K
Format: Article
Language:English
Subjects:
ADAPTACION
ADAPTATION
Adaptation, Physiological - genetics
AQUATIC PLANTS
Base Sequence
Chloroplasts
CYTOPLASMIC INHERITANCE
Disasters
Divergence
DNA Primers
DNA, Plant
DROUGHT RESISTANCE
Environmental conditions
Genetics
HEREDITE CYTOPLASMIQUE
HERENCIA CITOPLASMICA
HIBRIDACION NATURAL
HYBRIDATION NATURELLE
Hybridization
Hybridization, Genetic
Hybrids
Maternal effects
NATURAL HYBRIDIZATION
PLANTAS ACUATICAS
PLANTE AQUATIQUE
POTAMOGETON
Potamogeton anguillanus
Potamogetonaceae - genetics
Potamogetonaceae - physiology
RESISTANCE A LA SECHERESSE
RESISTENCIA A LA SEQUIA
Shoots
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Summary:We tested whether maternal effects have led to the adaptive divergence of strains of the natural hybrid Potamogeton anguillanus, whose putative parents show contrastingly divergent ecologies. To examine the correlation between phenotypic characters and maternal types, we conducted drought experiments and DNA typing using nuclear and chloroplast genes. In the field, we investigated the distribution of the maternal type along the depth and the inshore-offshore gradient. Hybrids of P. malaianus mothers (M-hybrids) and those of P. perfoliatus mothers (P-hybrids) could not be distinguished morphologically under submerged conditions, but differed in drought tolerance. M-hybrids and P. malaianus formed more terrestrial shoots and exhibited higher survival than P-hybrids and P. perfoliatus in drought experiments. The distribution survey clarified that M-hybrids were dominant in shallow and inshore areas, whereas they were almost absent in deeper and offshore areas. These results indicate that the natural hybrid P. anguillanus differs in adaptive values depending on the maternal type. Bidirectional hybridization and heritable maternal effects may have played important roles in its phenotypic adaptation to local environmental conditions.
ISSN:0918-9440
1618-0860
DOI:10.1007/s10265-007-0087-y