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pro vyhledávání: '"Marjorie C. Powell"'
Autor:
Marjorie C. Powell, A. C. Bunt
Publikováno v:
Scientia Horticulturae. 28:147-157
Alstroemeria ‘Campfire’ and ‘Red Sunset’ were propagated every 2 months throughout the year and grown at a minimum temperature of 9°C. The apices of aerial shoots on plants propagated in January and March showed signs of flower initiation wi
Publikováno v:
Scientia Horticulturae. 15:267-276
Carnation plants ( Dianthus cary ophyllus L.) cultivar ‘White Sim’, were grown in containers in a glasshouse under short (8 h) days. When the primary shoots had 4, 8 or 12 pairs of visible leaves, the plants were moved to a continuous-light area,
Autor:
Marjorie C. Powell, A.C. Bunt
Publikováno v:
Scientia Horticulturae. 20:193-202
Carnation plants cultivar ‘White Sim’ were grown in containers arranged to simulate the aerial environment of bed-grown crops. The effects of 2 plant densities (9 plants and 100 plants m −2 ) and 2 day-lengths (natural days and continuous light
The appearance and development of buds on leaf cuttings of Begonia × hiemalis in long and short days
Autor:
A.C. Bunt, Marjorie C. Powell
Publikováno v:
Scientia Horticulturae. 12:377-384
Bud initiation in leaf cuttings of Rieger begonia ‘Schwabenland Red’ was not affected by daylength. Approximately 30 buds per cutting were observed 13 weeks after insertion. Of these, an average of 8.2 developed into fully grown shoots in long da
Autor:
Marjorie C. Powell, A.C. Bunt
Publikováno v:
Scientia Horticulturae. 8:289-296
Plants of Begonia × hiemalis cultivar ‘Rieger's Schwabenland Red’ were grown in summer and winter under both long and short days, and the rates of leaf appearance and leaf growth were measured at regular intervals. Leaves appearing during short
Autor:
Marjorie C. Powell, A.C. Bunt
Publikováno v:
Scientia Horticulturae. 8:75-79
Factors influencing the number of flowers produced in Pelargonium × domesticum cultivar ‘Lavender Grand Slam’, and their rate of development after the plants had been given a period of low-temperature flower induction, were studied. Under short
Autor:
A.C. Bunt, Marjorie C. Powell
Publikováno v:
Scientia Horticulturae. 10:203-212
No consistent differences in growth were observed between leaf cuttings of Rieger begonia ‘Schwabenland Red’ taken from stock plants grown under different daylengths. The effects of supplementary illumination, daylength and polythene-covering tre
Autor:
A.C. Bunt, Marjorie C. Powell
Publikováno v:
Scientia Horticulturae. 24:359-367
Similar cycles of periodicity in shoot growth and development are recognizable in all three cultivars, despite the existence of quantitative differences. With a September planting, the first flowers were initiated in February or March and the product
Autor:
A.C. Bunt, Marjorie C. Powell
Publikováno v:
Scientia Horticulturae. 27:143-152
Short days (SD) given for 0, 1, 2, 4 or 8 weeks or continuously to cuttings 5, 8, 12, 16 or 20 weeks after propagation resulted in a range of flowering responses, depending on the time of year. During the winter, growth was inhibited by SD's but resu
Autor:
Marjorie C. Powell, A. C. Bunt
Publikováno v:
Journal of Horticultural Science. 61:523-531
SummaryThe validity of several functions of Gompertz, logistic and Richards types, as descriptions of leaf growth in Begonia × hiemalis in long days and with an intercalated period of short days was assessed on the basis of three criteria: (1) goodn