Sandersonia: Effect of Environmental Conditions on Growth, Flowering and Tuber Production

Kaddar, G.; Nissim-Levi, A.; Evenor, D.; Afgin, L.; Watad, A.A.; Luria, G.

doi:10.17660/actahortic.1997.430.117

Cited by 5 publications

(1 citation statement)

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“…Even though we have shown negative temperature differentials can be beneficial in terms of flower shape, practical application of these techniques is probably not realistic in New Zealand. These temperatures are lower than those recommended to maximise stem length and flower numbers reported by Kaddar et al, (1997). Fig.…”

Section: Discussionmentioning

confidence: 71%

Temperature and Light Requirements for Sandersonia Aurantiaca Flowering

Catley¹,

Brooking²,

Davies³

et al. 2002

Acta Hortic.

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The influences of temperature and irradiance on the time of flower initiation, sprouting, growth and flowering of Sandersonia aurantiaca were examined in a series of controlled environment studies. Plants were grown at constant temperatures o f 15, 18, 21, 24 or 27 o C; or at a mean temperature of 21 o C with day/night differentials of-6, 0, +6, +12 or +18 o C. Photosynthetic photon flux densities (PPF) were either 210, 460 or 700 µmol m-2 s-1 for 12 hours with photoperiod extension of 8 µmol m-2 s-1 for 2 hours. Flower initiation commenced after 62 days of sprouting at 12 o C, 30 days at 18 o C, and 22 days at 24 o C. At all temperatures, flower initiation had commenced before shoot emergence from the soil. Flower numbers per stem increased with sprouting temperature, growing temperature and irradiance. Under differential temperatures, the greatest number of flowers were produced at differentials of 0, +6 and +12 o C. However, the most desirable shaped flowers were grown at lower constant temperatures or smaller deviations in daily temperature. Stem length increased as constant growing temperatures increased to 24 o C and as the day/night differentials increased from-6 to +12 o C. In all cases, stem length decreased as irradiance increased. However, stem strength was in general inversely related to stem length, so that the strongest selfsupporting stems were produced under combinations of lower temperature and higher irradiance. The number of days to flowering decreased as temperature increased. Under the day/night differential growing regimes, plants flowered quickest in the control temperature of a constant 21 o C (0 o C differential).

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Section: Discussionmentioning

confidence: 71%