A hemiparasite in the forest understorey: photosynthetic
performance and carbon balance of Melampyrum pratense

J 2018

A hemiparasite in the forest understorey: photosynthetic performance and carbon balance of Melampyrum pratense

SVĚTLÍKOVÁ, Petra, Tomáš HÁJEK a Jakub TĚŠITEL

Základní údaje

Originální název

A hemiparasite in the forest understorey: photosynthetic performance and carbon balance of Melampyrum pratense

Autoři

SVĚTLÍKOVÁ, Petra (203 Česká republika), Tomáš HÁJEK (203 Česká republika) a Jakub TĚŠITEL (203 Česká republika, garant, domácí)

Vydání

Plant Biology, Wiley-Blackwell, 2018, 1435-8603

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10611 Plant sciences, botany

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 2.393

Kód RIV

RIV/00216224:14310/18:00100764

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1111/plb.12638

UT WoS

000417938000006

Klíčová slova anglicky

carbon balance modelling; heterotrophic carbon; parasitic plant; photosynthetic response; plant ecophysiology; sunfleck

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 20. 3. 2019 09:50, Mgr. Lucie Jarošová, DiS.

Anotace

V originále

Melampyrum pratense is an annual root-hemiparasitic plant growing mostly in forest understorey, an environment with unstable light conditions. While photosynthetic responses of autotrophic plants to variable light conditions are in general well understood, light responses of root hemiparasites have not been investigated. We carried out gas exchange measurements (light response and photosynthetic induction curves) to assess the photosynthetic performance of M. pratense in spring and summer. These data and recorded light dynamics data were subsequently used to model carbon balance of the hemiparasite throughout the entire growth season. Summer leaves had significantly lower rates of saturated photosynthesis and dark respiration than spring leaves, a pattern expected to reflect the difference between sun- and shade-adapted leaves. However, even the summer leaves of the hemiparasite exhibited a higher rate of light-saturated photosynthesis than reported in non-parasitic understorey herbs. This is likely related to its annual life history, rare among other understorey herbs. The carbon balance model considering photosynthetic induction still indicated insufficient autotrophic carbon gain for seed production in the summer months due to limited light availability and substantial carbon loss through dark respiration. The results point to potentially high importance of heterotrophic carbon acquisition in M. pratense, which could be of at least comparable importance as in other mixotrophic plants growing in forests – mistletoes and partial mycoheterotrophs. It is remarkable that despite apparent evolutionary pressure towards improved carbon acquisition from the host, M. pratense retains efficient photosynthesis and high transpiration rate, the ecophysiological traits typical of related root hemiparasites in the Orobanchaceae.

Návaznosti

GB14-36079G, projekt VaV

Název: Centrum analýzy a syntézy rostlinné diverzity (PLADIAS) (Akronym: PLADIAS)

Investor: Grantová agentura ČR, Centrum analýzy a syntézy rostlinné diverzity

Citovat

SVĚTLÍKOVÁ, Petra, Tomáš HÁJEK a Jakub TĚŠITEL. A hemiparasite in the forest understorey: photosynthetic performance and carbon balance of Melampyrum pratense. Plant Biology. Wiley-Blackwell, 2018, roč. 20, č. 1, s. 50-58. ISSN 1435-8603. Dostupné z: https://dx.doi.org/10.1111/plb.12638.

@article{1399204,
   author = {Světlíková, Petra and Hájek, Tomáš and Těšitel, Jakub},
   article_number = {1},
   doi = {http://dx.doi.org/10.1111/plb.12638},
   keywords = {carbon balance modelling; heterotrophic carbon; parasitic plant; photosynthetic response; plant ecophysiology; sunfleck},
   language = {eng},
   issn = {1435-8603},
   journal = {Plant Biology},
   title = {A hemiparasite in the forest understorey: photosynthetic performance and carbon balance of Melampyrum pratense},
   url = {http://onlinelibrary.wiley.com/doi/10.1111/plb.12638/full},
   volume = {20},
   year = {2018}
}

TY  - JOUR
ID  - 1399204
AU  - Světlíková, Petra - Hájek, Tomáš - Těšitel, Jakub
PY  - 2018
TI  - A hemiparasite in the forest understorey: photosynthetic performance and carbon balance of Melampyrum pratense
JF  - Plant Biology
VL  - 20
IS  - 1
SP  - 50-58
EP  - 50-58
PB  - Wiley-Blackwell
SN  - 14358603
KW  - carbon balance modelling
KW  - heterotrophic carbon
KW  - parasitic plant
KW  - photosynthetic response
KW  - plant ecophysiology
KW  - sunfleck
UR  - http://onlinelibrary.wiley.com/doi/10.1111/plb.12638/full
L2  - http://onlinelibrary.wiley.com/doi/10.1111/plb.12638/full
N2  - Melampyrum pratense is an annual root-hemiparasitic plant growing mostly in forest understorey, an environment with unstable light conditions. While photosynthetic responses of autotrophic plants to variable light conditions are in general well understood, light responses of root hemiparasites have not been investigated. We carried out gas exchange measurements (light response and photosynthetic induction curves) to assess the photosynthetic performance of M. pratense in spring and summer. These data and recorded light dynamics data were subsequently used to model carbon balance of the hemiparasite throughout the entire growth season. Summer leaves had significantly lower rates of saturated photosynthesis and dark respiration than spring leaves, a pattern expected to reflect the difference between sun- and shade-adapted leaves. However, even the summer leaves of the hemiparasite exhibited a higher rate of light-saturated photosynthesis than reported in non-parasitic understorey herbs. This is likely related to its annual life history, rare among other understorey herbs. The carbon balance model considering photosynthetic induction still indicated insufficient autotrophic carbon gain for seed production in the summer months due to limited light availability and substantial carbon loss through dark respiration. The results point to potentially high importance of heterotrophic carbon acquisition in M. pratense, which could be of at least comparable importance as in other mixotrophic plants growing in forests – mistletoes and partial mycoheterotrophs. It is remarkable that despite apparent evolutionary pressure towards improved carbon acquisition from the host, M. pratense retains efficient photosynthesis and high transpiration rate, the ecophysiological traits typical of related root hemiparasites in the Orobanchaceae.
ER  -

SVĚTLÍKOVÁ, Petra, Tomáš HÁJEK a Jakub TĚŠITEL. A hemiparasite in the forest understorey: photosynthetic performance and carbon balance of Melampyrum pratense. \textit{Plant Biology}. Wiley-Blackwell, 2018, roč.~20, č.~1, s.~50-58. ISSN~1435-8603. Dostupné z: https://dx.doi.org/10.1111/plb.12638.

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