Alterations in the sugar metabolism and in the vacuolar system of mesophyll cells contribute to the desiccation tolerance of Haberlea rhodopensis ecotypes
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Tartalom: http://real.mtak.hu/40015/
Archívum: MTA Könyvtár
Gyűjtemény: Status = In Press


Type = Article
Cím:
Alterations in the sugar metabolism and in the vacuolar system of mesophyll cells contribute to the desiccation tolerance of Haberlea rhodopensis ecotypes
Létrehozó:
Georgieva, Katya
Rapparini, Francesca
Bertazza, Giacomo
Mihailova, Gergana
Sárvári, Éva
Solti, Ádåm
Keresztes, Áron
Kiadó:
Springer
Dátum:
2015
Téma:
QK10 Plant physiology / nĂśvĂŠnyĂŠlettan
QK20 Plant morphology. Plant anatomy / nĂśvĂŠnymorfolĂłgia, -anatĂłmia
Tartalmi leírás:
Haberlea rhodopensis belongs to the small group
of resurrection plants having the unique ability to survive desiccation
to air dry state retaining most of its chlorophyll content
and then resume normal function upon rehydration. It
prefers the shady valleys and northward facing slopes of limestone
ridges in mountain zones with high average humidity.
Nevertheless, it can be found rarely on rocks directly exposed
to the sunlight, without the coverage of the canopy. In the
present study, we follow the alterations in the subcellular organization
of mesophyll cells and sugar metabolism upon
desiccation of shade and sun H. rhodopensis plants. Composition
and content of soluble carbohydrates during desiccation
and rehydration were different in plants grown below the trees
or on the sunny rocks. Sucrose, however, was dominating in
both ecotypes. The amount of starch grains in chloroplasts
was inversely related to that of sugars. Concomitantly with
these changes, the number of vacuoles was multiplied in the
cells. This can be explained by the development of small
(secondary) vacuoles peripherally in the cytoplasm, rather
than by the fragmentation of the single vacuole, proposed
earlier in the literature. Accordingly, the centripetal movement
of chloroplasts and other organelles may be a result of the
dynamic changes in the vacuolar system. Upon rehydration,
the inner vacuoles enlarged and the organelles returned to their
normal position.
Nyelv:
magyar
Típus:
Article
PeerReviewed
info:eu-repo/semantics/article
Formátum:
text
Azonosító:
Georgieva, Katya and Rapparini, Francesca and Bertazza, Giacomo and Mihailova, Gergana and Sárvári, Éva and Solti, Ádám and Keresztes, Áron (2015) Alterations in the sugar metabolism and in the vacuolar system of mesophyll cells contribute to the desiccation tolerance of Haberlea rhodopensis ecotypes. Protoplasma. pp. 1-9. ISSN 0033-183X (Print) 1615-6102 (Online) (In Press)
Kapcsolat:
10.1007/s00709-015-0932-0