Journal
TREES-STRUCTURE AND FUNCTION
Volume 28, Issue 2, Pages 373-379Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s00468-013-0955-0
Keywords
Maternal effects; Maritime pine; Pitch canker disease; Sugar analysis; FT-IR; Polysaccharides
Categories
Funding
- Instituto Nacional de Investigacion Agraria [RTA2007-100]
- Ministerio de Ciencia e Innovacion (MCI) [AGL2010-18724]
- Fundacao para a Ciencia e a Tecnologia (FCT, Portugal)
- European Union
- QREN
- FEDER
- COMPETE
- FPU-PREDOC programme of MCI
- FCT [SFRH/BPD/46584/2008]
- Fundação para a Ciência e a Tecnologia [SFRH/BPD/46584/2008] Funding Source: FCT
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Carbohydrate differences in offspring as a consequence of maternal effects explain transgenerational tree-pathogen interactions. The expression of disease is increasingly recognised as being influenced by maternal effects, given that environmental conditions experienced by mother trees affect tolerance in offspring. It is hypothesised that plant carbohydrates could mediate transgenerational tree-pathogen interactions. The carbohydrate content of Pinus pinaster seedlings obtained from two contrasting maternal environments was studied and seedlings from the two environments were challenged with Fusarium circinatum. The representative mid-infrared spectra of samples in the range of the carbohydrates diagnosed higher proportion of methylesterified pectic polysaccharides and lower proportion of nonesterified pectic polysaccharides for inoculated than for control seedlings. Total carbohydrate content of seedlings from the unfavourable environment did not differ much from total carbohydrate content of seedlings from the favourable maternal environment. However, glucose was 13 % higher and uronic acids 11 % lower in seedlings from the favourable environment after inoculation in comparison to seedlings from the unfavourable maternal environment which had their carbohydrate contents unaltered after inoculation. It is concluded that plant carbohydrates mediate transgenerational tree-pathogen interactions.
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