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    • Desert Plants, Volume 25, Number 2 (December 2009)
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    Effect of Pre-germination Treatments on Seed Germination of Helianthemum lippii (L.) Dum.Cours.

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    Author
    Zaman, S.
    Padmesh, S.
    Tawfiq, H.
    Affiliation
    Aridland Agriculture and Greenery Department, Kuwait Institue for Scientific Research
    Issue Date
    2009-12
    
    Metadata
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    Publisher
    University of Arizona (Tucson, AZ)
    Journal
    Desert Plants
    Rights
    Copyright © Arizona Board of Regents. The University of Arizona.
    Collection Information
    Desert Plants is published by The University of Arizona for the Boyce Thompson Southwestern Arboretum. For more information about this unique botanical journal, please email the College of Agriculture and Life Sciences Publications Office at pubs@cals.arizona.edu.
    Abstract
    Helianthemum lippii (L.) Dum. Cours. is a perennial shrubby plant 10-45 cm tall that belongs to the family Cistaceae. The effects of pretreatments on germination of Helianthemum lippii provide information regarding germination requirements of this species, which could be used for conservation studies. Five different pretreatment were applied to enhance seed germination. Scarification followed by germination at 6 different constant temperatures (10, 15, 20, 25, 30 and 35°C) with continuous light or dark, Scarification followed by GA3 soaking (100, 250,500,750 and 1000 ppm), Heat and moist stratification (only intact seeds), KNO₃ and H₃BO₃ soaking (only intact seeds). The results obtained from this study indicate that germination in H. lippii was promoted by scarification. Scarification of seeds resulted in high germination while increasing germination temperature (35°C) decreased the germination of scarified seeds. Exposure to light and dark had no effect on germination. Heat stratification, cold stratification, KNO₃ and H₃BO₃ treatments were ineffective in increasing germination of H.lippii seeds. Scarification yielded maximum germination without soaking in GA₃ It increased the germination of Helianthemum lippii seeds from 1 to 99%. Increase in GA₃ concentration decreased the germination of this species. Scarification succeeded in breaking dormancy of H.lippii seeds suggesting that this species exhibits seed coat dormancy and in nature it may happen due to the abrasion of seed coat by sand particles or other biotic and abiotic factors.
    Type
    Article
    ISSN
    0734-3434
    Collections
    Desert Plants, Volume 25, Number 2 (December 2009)

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