Brunet, Jörg
- Institutionen för sydsvensk skogsvetenskap, Sveriges lantbruksuniversitet
Forskningsartikel2018Vetenskapligt granskadÖppen tillgång
Atmospheric nitrogen deposition on petals enhances seed quality of the forest herb Anemone nemorosa
De Frenne, P.; Blondeel, H.; Brunet, J.; Caron, M. M.; Chabrerie, O.; Cougnon, M.; Cousins, S. A. O.; Decocq, G.; Diekmann, M.; Graae, B. J.; Hanley, M. E.; Heinken, T.; Hermy, M.; Kolb, A.; Lenoir, J.; Liira, J.; Orczewska, A.; Shevtsova, A.; Vanneste, T.; Verheyen, K.
Sammanfattning
Elevated atmospheric input of nitrogen (N) is currently affecting plant biodiversity and ecosystem functioning. The growth and survival of numerous plant species is known to respond strongly to N fertilisation. Yet, few studies have assessed the effects of N deposition on seed quality and reproductive performance, which is an important life-history stage of plants. Here we address this knowledge gap by assessing the effects of atmospheric N deposition on seed quality of the ancient forest herb Anemone nemorosa using two complementary approaches. By taking advantage of the wide spatiotemporal variation in N deposition rates in pan-European temperate and boreal forests over 2years, we detected positive effects of N deposition on the N concentration (percentage N per unit seed mass, increased from 2.8% to 4.1%) and N content (total N mass per seed more than doubled) of A.nemorosa seeds. In a complementary experiment, we applied ammonium nitrate to aboveground plant tissues and the soil surface to determine whether dissolved N sources in precipitation could be incorporated into seeds. Although the addition of N to leaves and the soil surface had no effect, a concentrated N solution applied to petals during anthesis resulted in increased seed mass, seed N concentration and N content. Our results demonstrate that N deposition on the petals enhances bioaccumulation of N in the seeds of A.nemorosa. Enhanced atmospheric inputs of N can thus not only affect growth and population dynamics via root or canopy uptake, but can also influence seed quality and reproduction via intake through the inflorescences.
Nyckelord
Latitudinal gradient; nitrogen deposition; nutrient stoichiometry; seed provisioning; seed quality; sexual reproduction; wood anemone
Publicerad i
Plant Biology
2018, Volym: 20, nummer: 3, sidor: 619-626
Utgivare: WILEY
SLU författare
UKÄ forskningsämne
Botanik
Publikationens identifierare
DOI: https://doi.org/10.1111/plb.12688
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/95039