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Deterioration of willow seeds during storage.

Abstract：

:Willow (Salix spp.) seeds are able to tolerate desiccation, but differ from typical orthodox seeds in that they lose viability in a few days at room temperature, and in that the chloroplasts in embryo tissues do not dedifferentiate during maturation drying, thus retaining chlorophyll and maintaining intact their thylakoid membranes. In the present study, we investigated the damage generated in willow seeds during storage under appropriate conditions to exclude the eventual generation of reactive oxygen species by photooxidation. To this end, we measured different indicators of molecular damage, such as changes in the fatty acid profile, protein degradation, nuclease activities, and DNA damage, and evaluated normal germination and total germination in seeds stored for one, ten and sixteen years. We found: (i) a decrease in the fraction of unsaturated fatty acids; (ii) changes in the protein profile due to a decrease in protein solubility; (iii) activation of nucleases; and (iv) DNA fragmentation. Taken together, our findings identified programmed cell death as a key mechanism in seed deterioration during storage. We also found that, although the seeds maintained high percentages of total germination, the death program had already started in the seeds stored for ten years and was more advanced in those stored for sixteen years.

journal_name

Sci Rep

journal_title

Scientific reports

authors

López-Fernández MP,Moyano L,Correa MD,Vasile F,Burrieza HP,Maldonado S

doi

10.1038/s41598-018-35476-3

subject

Has Abstract

pub_date

2018-11-21 00:00:00

pages

17207

issue

1

issn

2045-2322

pii

10.1038/s41598-018-35476-3

journal_volume

8

pub_type

杂志文章

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