Cardinal temperatures for germination of Salvia leriifolia Benth.

• Autorzy: Dashti M. , Kafi M. , Tavakkoli H. , Mirza M.

Warianty tytułu

PL

Wskaźniki temperatur kiełkowania Salvia leriifolia Benth.

• Języki publikacji: EN

Abstrakty

EN

The focus of this study is based on the egzamination of the germination traits and the development of thermal models of the medicinal plant Salvia leriifolia Benth. A laboratory experiment was carried out at constant temperatures ranging from 0 to 35°C, at 5°C intervals in a completely randomized design with eight replications. To describe the germination rate response to temperature, three regression models, namely Intersected-Lines (ISL), Quadratic Polynomial (QPN) and Five-Parameters Beta (FPB) were used. The highest Germination Percentage (GP) (92.8%) occurred in 15°C, but GP in the range of 10–25°C was not significant (p≤0.05). The germination process stopped at 0°C and at above 30°C. The results indicated that the highest Germination Rate (GR), the lowest Mean Germination Time (MGT) and also times to 50% germination (D50) were obtained at 20°C. Seeds did not reach to their 50% germination level in temperatures higher than 25°C. The FPB model had the best realistic estimation for cardinal temperatures. Based on models estimation, Base (Tb), Optimum (To) and Ceiling (Tc) temperatures were in the ranges of (1–1.9°C), (18.1–20.8°C) and (34.5–38.7°C), respectively.

PL

Celem pracy było badanie cech kiełkowania i określenie wskaźników temperatur kiełkowania rośliny leczniczej Salvia leriifolia Benth. Badanie laboratoryjne przeprowadzono przy stałych temperaturach z zakresu od 0 do 35°C, w odstępach co 5°C. Badano losowo wybrane diaspory w ośmiu powtórzeniach. W celu opisania wpływu temperatury na zdolność kiełkowania, zastosowano trzy modele regresji, mianowicie: segmentową regresję liniową (ISL), wielomianu kwadratowego (QPN) i regresję pięcioparametrową (FPB). Najwięcej nasion (92.8%) wykiełkowało w 15°C, przy czym różnice w wartości wskaźników zdolności kiełkowania (GP) w zakresie 10–25°C nie były istotne statystycznie (p≥0.05) Proces kiełkowania ustawał w temperaturze poniżej 0°C i powyżej 30°C. Wykazano, że najwyższy wskaźnik szybkości kiełkowania (GR), najkrótszy średni czas kiełkowania (MGT), a także najkrótszy czas kiełkowania 50% diaspor (D50) występują w temperaturze 20°C. W temperaturach powyżej 25oC nie uzyskano poziomu 50% kiełkujących nasion. Model FPB najlepiej przybliżał rzeczywiste wartości temperatur. Na podstawie zastosowanych modeli regresji stwierdzono, że temperatury minimalna (Tb), optymalna (To) i maksymalna (Tc) wynosiły odpowiednio: 1–1,9°C, 18,1–20,8°C i 34,5–38,7°C.

Słowa kluczowe

EN

medicinal plant; temperature; germination; Salvia leriifolia; regression model

• Wydawca: -
• Czasopismo: Herba Polonica
• Rocznik: 2015
• Tom: 61
• Numer: 1
• Opis fizyczny: p.5-18,fig.,ref.

Twórcy

autor

Dashti M.

• Department of Agronomy, Ferdowsi University of Mashhad, Mashhad, Iran
• Khorasan-e-Razavi, Agricultural and Natural Resources Research Center, Mashhad, Iran

autor

Kafi M.

• Department of Agronomy, Ferdowsi University of Mashhad, Mashhad, Iran

autor

Tavakkoli H.

• Khorasan-e-Razavi, Agricultural and Natural Resources Research Center, Mashhad, Iran

autor

Mirza M.

• Research Institute of Forest and Rangeland, Medicinal Plant Research Branch, Tehran, Iran

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