Naslov
Estimation of germination parameters of four European ecotypes of Ambrosia artemisiifolia: contribution to the predictive emergence model

Autori
Nikolić, Nebojša ; Šoštarčić, Valentina ; Šćepanović, Maja ; Masin, Roberta

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Skup
International Ragweed Society Conference

Mjesto i datum
Budimpešta, Mađarska, 08.09.2022. - 09.09.2022

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
base temperature ; base water potential ; seed ; weight

Sažetak
Ambrosia artemisiifolia L. is one of the most invasive weed species in Europe. Thanks to its adaptability, it has easily spread throughout most of Europe. In this work, four replicas of 50 seeds each for germination tests and 100 seeds for characteristics measurements, from four different ecotypes of A. artemisiifolia were used: Italy (I), France (F), Croatia (HR) and Serbia (SRB) and tested for germination parameters (base temperature (Tb) and base water potential (Ψb)) and seed characteristics (seed size, weight). For base temperature estimation, germination tests were performed in climatic chambers at 11 constant temperatures (1 to 30°C) and with a photoperiod of 12:12h (day: night). For base water potential estimation seeds were exposed to 9 different water potentials (0-(control) to -2 MPa) at 24°C, using PEG 6000 solutions to simulate water availability. Both germination parameters (Tb and Ψb) were determined using drc and drcSeedGerm packages in R, while seed size was measured under a microscope using a graduated scale. The results indicate that Tb differed between ecotypes and ranged from 0.58°C (I) to 2.74°C (F), with the I ecotype statistically different from the other ectoypes, Ψb ranges from -0.74 (HR) to -1.35 MPa (SRB) with the I and HR ecotypes statistically different from the SRB and F ecotypes. For both seed size parameters (length and width) and seed weight the I ecotype showed the lower values, ranging from: Length (mm) 2.98 to 3.39 ; Width (mm) 1.76 to 2.27 ; Weight (g) 0.34 to 0.45. These differences in the morphological and phenological traits of the different ecotypes are important to understand the invasive potential of the species, moreover they can serve as a basis for predictive models, where using Tb and Ψb it will be possible to better predict the emergence of these ecotypes, resulting in more effective control.

Izvorni jezik
Engleski

Znanstvena područja
Biologija, Poljoprivreda (agronomija)

POVEZANOST RADA