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

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60076658%3A12310%2F18%3A43897312" target="_blank" >RIV/60076658:12310/18:43897312 - isvavai.cz</a>

Alternative codes found

RIV/67985939:_____/18:00490385 RIV/00216224:14310/18:00100764

Result on the web

<a href="https://onlinelibrary.wiley.com/doi/full/10.1111/plb.12638" target="_blank" >https://onlinelibrary.wiley.com/doi/full/10.1111/plb.12638</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/plb.12638" target="_blank" >10.1111/plb.12638</a>

Result language

angličtina

Original language name

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

Original language description

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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10611 - Plant sciences, botany

Project

<a href="/en/project/GB14-36079G" target="_blank" >GB14-36079G: Plant diversity analysis and synthesis centre (PLADIAS)</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2018

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Plant Biology

ISSN

1435-8603

e-ISSN

—

Volume of the periodical

20

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

9

Pages from-to

50-58

UT code for WoS article

000417938000006

EID of the result in the Scopus database

2-s2.0-85038027550