The Effects of Light and Temperature on Germination of Stevia (Stevia rebaudiana BERT.) Seeds

Autor: Esra UÇAR, Yaşar ÖZYİĞİT, Kenan TURGUT
Jazyk: English<br />Turkish
Rok vydání: 2016
Předmět:
Zdroj: Türkiye Tarımsal Araştırmalar Dergisi, Vol 3, Iss 1, Pp 37-40 (2016)
Druh dokumentu: article
ISSN: 2148-2306
2528-858X
DOI: 10.19159/tutad.76528
Popis: The Stevia rebaudiana (Bert.) Bertoni is a perennial herbaceous plant and belongs to family of Asteraceae (Compositae). The contents of S. rebaudiana (Bert.) Bertoni consist mainly non-caloric stevioside and rebaudioside A sweeteners. Low seed germination is an important problem in stevia cultivation. Therefore in this study, the effects of light and temperature on germination performance of stevia seeds were studied. Stevia rebaudiana seeds were treated with two lights (light/darkness) and four different temperatures (15 ºC, 20 ºC, 25 ºC, 30 ºC). For each treatment, 50 seeds were counted and placed into petri dishes. Experiments were conducted as a randomized complete design method with three replicates. Germination was started within 6 to 10 days depending on the treatments. The highest seed germination rate (71%) was observed in darkness/25 ºC temperature and followed by darkness/20 ºC (68%) and light/25 ºC (67%). On the other hand, the lowest seed germination rate (31%) was obtained from 15 ºC in both light and dark conditions and followed by darkness/30 ºC (43%) and light/30 ºC (49%). The results showed that lower (15 ºC) and higher (30 ºC) temperatures significantly decreased the germination rates of stevia independently from the light treatments.
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