Ye-Qing  Wu, Meng  Zhang, 
    Effects on Polyploidy Induction in Asparagus Lettuce of Concentration and Presoaking Time of Colchicine,
    Agricultural Journal,
    Volume 7,Issue 3,
    2012,
    Pages 177-179,
    ISSN 1816-9155,
    aj.2012.177.179,
    (https://makhillpublications.co/view-article.php?doi=aj.2012.177.179)
    Abstract: Different concentration and presoaking time of colchicine to induce polyploidy in asparagus lettuce were studied in this research. The results showed that the colchicine had an obvious inhibiting effect on asparagus lettuce sprout and the inhibitory effect is more obvious with increasing presoaking time of colchicine. Asparagus lettuce plant through colchicine presoaking can increase the diameter of stems, reduce the plant height and increase stoma density. The sprout ratio and variant plants treated with 100 mg L<SUP>-1</SUP> colchicine concentration 32 and 48 h, 500 mg L<SUP>-1</SUP> colchicine concentration 4, 8 and 48 h and 1000 mg L<SUP>-1</SUP> colchicine concentration 4 h were better and can be used in production.
    Keywords: Colchicine;concentration;presoaking time;polyploidy;asparagus lettuce