Artikkelit jotka sisältää sanan 'polyamiinit'
Kasvualustan kuivumisen vaikutukset rahkasaraturpeeseen istutettujen männyntaimien ensikehitykseen.
English title: High and dry: Consequences of drought exposure in Scots pine seedlings grown in authentic peat soil.
Original keywords:
männyntaimet;
Pinus sylvestris;
kuivuus;
rahkasaraturve;
fotosynteesin tehokkuus (Fv/ Fm);
mykorritsat;
polyamiinit;
juurten ja versojen kasvu
English keywords:
drought;
Fv/Fm;
mycorrhizal colonization;
Pinus sylvestris seedlings;
poly-amines;
root and shoot growth;
Sphagnum-Carex peat
Tiivistelmä |
Näytä lisätiedot
|
Artikkeli PDF-muodossa |
Tekijät
Should the frequency of drought increase in boreal forests due to climate change, seedlings planted in prepared peat mounds could become more susceptible to soil desiccation. The resistance of Scots pine (Pinus sylvestris L.) seedlings to drought will thus be a key factor in the regeneration success of pine-dominated, forestry-drained peatlands. In this study, we evaluated the physiological, metabolic, and morphological responses of year-old seedlings gradually exposed to extreme drought in highly decomposed Sphagnum-Carex peat blocks. Drought clearly suppressed root and shoot growth as well as fractional colonization of ectomycorrhizal fungi. Sustained declines in photochemical efficiency (Fv/Fm) of previous-year and current-year needles did not occur until the volumetric soil water content had dropped to 30% and 10%, respectively. Polyamine analysis revealed that new needles are preferred in protecting the different parts of the seedlings against drought stress. Despite growth losses, the maintenance of rather high photochemical efficiency in current-year needles under severe water stress would appear to indicate a potential for seedling recovery if water availability in the peat improved. Given the high tolerance exhibited by Scots pine seedlings, death by drought seems a lesser concern.
-
Pearson,
Finnish Forest Research Institute, Parkano Research Unit, Kaironiementie 15, FI-39700 Parkano, Finland
Sähköposti:
ei.tietoa@nn.oo
- Saarinen, Sähköposti: ei.tietoa@nn.oo
- Heiskanen, Sähköposti: ei.tietoa@nn.oo
- Sarjala, Sähköposti: ei.tietoa@nn.oo
- Laine, Sähköposti: ei.tietoa@nn.oo
Click this link to register to Suo - Mires and peat.
Jos olet rekisteröitynyt käyttäjä, kirjaudu sisään tallentaaksesi valitsemasi artikkelit myöhempää käyttöä varten.
Valitsemasi artikkelit
Lähetä sähköpostiin
Lähetä sähköpostiin
Ruuhijärvi R.,
(1974)
On the cranberry yields on peatlands
Suo - Mires and peat
vol. 25
no. 2
artikkeli 9423
(poista)
| Muokkaa kommenttia
Mäkinen Y.,
(1974)
On the cultivation of cloudberry
Suo - Mires and peat
vol. 25
no. 3-4
artikkeli 9429
(poista)
| Muokkaa kommenttia
Bosse U.,
Frenzel P.
(2001)
CH4 emissions from a West Siberian mire
Suo - Mires and peat
vol. 52
no. 3-4
artikkeli 9816
(poista)
| Muokkaa kommenttia
Haahti K.,
Koivusalo H.
et al.
(2012)
Factors affecting the spatial variability of wat..
Suo - Mires and peat
vol. 63
no. 3-4
artikkeli 9883
(poista)
| Muokkaa kommenttia
Suo - Mires & Peat
