Effect of gibberellic acid and temperature on germination of Vitex montevidensis Cham

Abstract

This work aims to evaluate treatments that may help improve speed and uniformity of germination in fruit tree species tarumã. Data were obtained from pyrenes (stones) of ripe fruits which in turn were picked from adult trees in the municipality of Vera Cruz do Oeste-PR. Treatments consisted of applying GA 3 solutions at various concentrations (zero, 50 mg L -1 , 100 mg L -1 or 200 mg L -1 ) to pyrenes via immersion for 47 hours, and thermoperiods of alternate 20ºC and 30ºC (8 hours at 20ºC in light conditions, and 16 hours at 30ºC in dark conditions) and constant 30ºC with the same photoperiod. The combination of alternate temperatures of 20ºC and 30ºC with a 200 mg L -1 GA 3 solution resulted in an increase both in germination percentage, from 19.2% to 56.2%, and in the germination speed index, from 0.19 to 3.12, with resulting normal, uniform seedlings.

Vibrational spectrum of solid picene (C22H14)

“…Solid picene was prepared by a new optimized synthesis route which permits us to obtain bulk quantities (hundreds of milligrams in one shot) of pure polycrystalline picene powder [22]. Refinements of the x-ray diffraction spectrum of our sample yielded results identical to those previously reported [15].…”

Aspectos da germinação e desenvolvimento inicial de plântulas de aroeira

“…A aplicação do ácido giberélico foi eficiente na promoção do crescimento de mudas de palmeira-ráfia (Rhapis excelsa (Thunb) Henry ex Rehder), sendo esse incremento significativo no comprimento dos pecíolos, lâminas foliares e altura da planta (TAVARES et al, 2007). Malavasi et al (2011) recomendaram a pré-embebição de sementes de tarumã (Vitex montevidensis Cham.) em 100 a 200 mg.L -1 de giberelina para obter elevada porcentagem e velocidade de germinação das sementes.…”

SEEDLING EMERGENCY AND BIOMETRY OF FRUITS AND SEEDS OF Cariniana pyriformis FROM THE MIDDLE MAGDALENA VALLEY, COLOMBIA

“…L -1 ). In Vitex montevidensis Cham, another species of forest and ecological interest, Malavasi et al (2011) concluded that the application of 200 mg . L -1 of GA 3 for 47 hours allowed increasing the germination from 19 to 56%.…”