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Winter blindness of gladiolus: interaction of light and temperature

Acta Horticulturae (47): 277-285

Winter blindness of gladiolus: interaction of light and temperature

Total solar radiation was the most important factor affecting winter flowering of gladiolus. Winter low light energy fluxes affected flower development directly, whereas short days had a dual effect, one of reducing the total daily solar radiation and the other a photoperiodic effect of reducing the time from planting to flowering, thus decreasing the total solar radiation. Plants at the 4th to 6th leaf stages were most sensitive to prevailing light conditions.

Accession: 000577678

Related references

Shillo R.; Halevy A.H., 1975: Winter blindness of gladiolus grandiflorus interaction of light and temperature. Acta Horticulturae (Wageningen) 47: 277-286

Kosugi, K.; Sumitomo, M., 1956: Studies on blindness in gladiolus. III. On the response of gladiolus varieties to temperature and light.. In experiments designed to find a variety of gladiolus for winter flowering Atom, Hector, Scarlet Princeps and Spic and Span proved relatively insensitive to low temperatures and reduced light intensity and duration. Birch Red and the autumn flowe...

Kosugi, K., 1957: Studies on blindness in gladiolus. IV. Effects of defoliation and low light intensity on flowering of gladiolus.. Flowering percentage was not affected by leaf removal or by reduced light intensity, or, in the case of a winter crop, by supplementary lighting. One of the varieties grown in winter, Picardy, failed to flower because the temperature was too low,...

Kosugi, K.; Kondo, M., 1961: Studies on blindness in gladiolus. VIII. Effects of nutritional treatments on flowering and blindness in gladiolus grown from cormels.. Treatments applied to gladiolus plants grown from cormels in boxes of sand included IN (50 p.p.m.) 1P(25p.p.m.)1K(40p.p.m.), 2N 1P 1K, 4N 1P 1K, 1N 1P 2K, 2N1P 2K, 4N 1P 2K, 1N 2P 1K, 2N 2P 1K, 4N 2P 1K, 1N 2P 2K, 2N 2P 2K and 4N 2P 2K. Earliest f...

Kosugi, K.; Kondo, M., 1961: Studies on blindness in gladiolus. X. On the effects of soil moisture upon growth, flowering, and blindness in gladiolus.. When corms of the variety T. E. Wilson wer e watered every 1, 3, 6 and 9 days, 15.5% of blind plants were produced in the plot receiving water every sixth day and 51% in the plot which was watered every ninth day. No blind plants occurred in the p...

Kosugi, K., 1960: Studies on blindness in gladiolus. VI. Effects of fertilizer treatment on flowering in gladiolus.. Gladiolus corms planted in sand were supplied with 3 levels of N and 2 each of K and P. No significant differences were observed in percentage of flowering, height of plants, number of leaves and number of florets. Early flowering occurred in plan...

Kosugi, K., 1959: Studies on blindness in gladiolus. V. Effects of daylength on the auxin level in the flower buds of gladiolus.. The variety Spotlight grown under long (24 hr.) and short (8 hr.) photoperiods from October 10 until November 6 was sampled for auxin content at weekly intervals, using the Avena coleoptile test. Auxin reaction from the short-day plants was less t...

Kosugi, K.; Sano, Y., 1961: Studies on blindness in gladiolus. IX. Effect of nitrogen applications on the auxin content of gladiolus flower buds. Small corms of the variety Spotlight growing in sand received either N (100 p.p.m.) twice a week, from 21 April to 27 June, or no N. Plant height, weight of tops, percentage flowering and percentage of N in the dry matter of the tops were all lowe...

Kosugi, K., 1953: Studies on blindness in gladiolus. 1. Effects of daylength upon the flower-bud differentiation and flower opening in gladiolus.. Experiments were made on the influence of day-length on blindness in gladiolus using supplementary light and artificial shading. The flower bud apparently differentiates as the stem elongates regardless of day-length; but the flower often aborts a...

Pitta, G.P.B.; Figueiredo, M.B.; Cardoso, R.M.G.; Hennen, J.F., 1981: Rust (Uromyces transversalis (Thuemen) Winter), a new disease of gladiolus (Gladiolus spp.) in Brazil. The disease was newly recorded in several areas. Symptoms were reproduced on inoculation in the glasshouse. Some plants growing wild in the Biol. Inst. garden were more resistant than certain commercial varieties.