| 000 | 03060nam a22003377a 4500 | ||
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| 003 | ZW-GwMSU | ||
| 005 | 20250219104925.0 | ||
| 008 | 250219b |||||||| |||| 00| 0 eng d | ||
| 022 | _a0176-1617 | ||
| 040 |
_aMSU _bEnglish _cMSU _erda |
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| 050 | 0 | 0 | _aQK711.2 JOU |
| 100 | 1 |
_aFlores-Bavestrello, Alejandra _eauthor |
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| 245 | 1 | 0 |
_aTwo Hymenophyllaceae species from contrasting natural environments exhibit a homoiochlorophyllous strategy in response to desiccation stress _ccreated by Alejandra Flores-Bavestrello, Marianna Król, Alexander G Ivanov, Norman P A Hüner, José Ignacio García-Plazaola, Luis J Corcuera, León A Bravo |
| 264 | 1 |
_aAmsterdam: _bElsevier GmbH, _c2016. |
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| 336 |
_2rdacontent _atext _btxt |
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| 337 |
_2rdamedia _aunmediated _bn |
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| 338 |
_2rdacarrier _avolume _bnc |
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| 440 |
_aJournal of plant physiology _vVolume 191 |
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| 520 | 3 | _aHymenophyllaceae is a desiccation tolerant family of Pteridophytes which are poikilohydric epiphytes. Their fronds are composed by a single layer of cells and lack true mesophyll cells and stomata. Although they are associated with humid and shady environments, their vertical distribution varies along the trunk of the host plant with some species inhabiting the drier sides with a higher irradiance. The aim of this work was to compare the structure and function of the photosynthetic apparatus during desiccation and rehydration in two species, Hymenophyllum dentatum and Hymenoglossum cruentum, isolated from a contrasting vertical distribution along the trunk of their hosts. Both species were subjected to desiccation and rehydration kinetics to analyze frond phenotypic plasticity, as well as the structure, composition and function of the photosynthetic apparatus. Minimal differences in photosynthetic pigments were observed upon dehydration. Measurements of ϕPSII (effective quantum yield of PSII), ϕNPQ (quantum yield of the regulated energy dissipation of PSII), ϕNO (quantum yield of non-regulated energy dissipation of PSII), and TL (thermoluminescence) indicate that both species convert a functional photochemical apparatus into a structure which exhibits maximum quenching capacity in the dehydrated state with minimal changes in photosynthetic pigments and polypeptide compositions. This dehydration-induced conversion in the photosynthetic apparatus is completely reversible upon rehydration. We conclude that H. dentatum and H. cruentum are homoiochlorophyllous with respect to desiccation stress and exhibited no correlation between inherent desiccation tolerance and the vertical distribution along the host tree trunk. | |
| 650 | _aDesiccation tolerance | ||
| 650 | _aFilmy ferns | ||
| 650 | _aHomoiochlorophyllous | ||
| 700 | 1 |
_aKról, Marianna _eco-author |
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| 700 | 1 |
_aIvanov, Alexander G _eco-author |
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| 700 | 1 |
_aHüner, Norman P A _eco-author |
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| 700 | 1 |
_aGarcía-Plazaola, José Ignacio _eco-author |
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| 700 | 1 |
_aCorcuera, Luis J _eco-author |
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| 700 | 1 |
_aBravo, León A _eco-author |
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| 856 | _u10.1016/j.jplph.2015.12.003 | ||
| 942 |
_2lcc _cJA |
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| 999 |
_c168999 _d168999 |
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