00000caa a22000003i 4500 UP-1685594773862387710 Buklod 20210211124537.0 m | | ta 210211s1977 xx r |||| u|eng d (iLib)UPBAG-00039236837 STII-DOST BAG rda eng ARTICLE-2002 Castro, Irma Remo 1946 author. The effect of photoperiod on the flowering of Polytrias amaura (Buse) O. Ktze Irma Remo and Reynaldo A. Tabbada. 1977. page 25-36 illustrations 26 cm text rdacontent unmediated rdamedia volume rdacarrier Includes bibliographical references (page 36) This paper studied the effect of photoperiod on the induction of flowering in Polytrias amaura (Buse) O. Ktza, a probable allergenic species. Plants were grown under varying lengths of light and dark period using dark chambers. The age of ripeness-to-flower, number of photo-inductive cycles needed and the effect of light-interrupted-dark-period under short-day conditions were also determined. Results showed that P. amaura is an obligate short-day plant, attaining the age of ripeness-to-flower after about 45 days and needs a minimum of 30 short-day treatments before flowering. Light-interrupted-dark-periods prevent flowering confirming further that P. amaura is a short-day plant. Polytrias amaura. Grass (Polytrias amaura), Javanese Flowering induction Photoperiod, Effect of. Tabbada, Reynaldo A. author. The Philippine Journal of Science Vol. 106 nos.1-2, March-June 1977. FI UPBAG UPBAG-MAIN ARTICLE-2002 Analytics