English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Effects of temperature and photoperiod on growth rates and morphological development of Dahlia pinnata Cav. 'Royal Dahlietta Yellow' were determined by growing plants under 45 combinations of day and night temper- atures (DT and NT, respectively, and photoperiod. DT and NT ranged from 10 to 30C and photoperiods from 10 to 24 hours·day -1 . Photoperiod influenced vegetative development more than reproductive development as plants flow- ered in all photoperiods. Lateral shoot count and length decreased and tuberous root weight increased as photoperiod decreased from 16 to 10 hours. Temperature interacted with photoperiod to greatly increase tuberous root formation as temperature decreased from 25 to 15C. Increasing temperature from 20 to 30C increased the number of nodes below the first flower. Flower count and diameter decreased as average daily temperature increased. Nonlinear regression analysis was used to estimate the maximum rate and the minimum, optimum, and maximum temperatures for leaf-pair unfolding rate (0.29 leaf pair/day, 5.5, 24.6, and 34.9C, respectively), flower development rate from pinch to visible bud (0.07 flower/day, 2.4, 22.4, and 31.1C, respectively), and flower development rate from visible bud to flower (0.054 flowers/day, 5.2, 24.4, and 31.1C, respectively). The results collectively indicate a relatively narrow set of conditions for optimal 'Royal Dahlietta Yellow' dahlia flowering, with optimal defined as fast-developing plants with many large flower buds and satisfactory plant height. These conditions were a 12- to 14-hour photoperiod and ≈ 20C. Dahlias propagated by tuberous roots or seed have been used as bedding plants, garden plants, and cut flowers for many years. Several cutting-propagated, dwarf dahlia cultivars have recently been introduced, making possible large-scale, commercial pro- duction of cutting-propa gated dahlias as flowering pot plants. Precise knowledge of the relationships between dahlia growth and development and temperature and photoperiod is essential for optimum potted-plant production. Previous research with tuberous and seed-propagated dahlias has shown that most cultivars are quantitative short day (SD) plants for flower initiation, with an optimum photoperiod of 12 to 14 h (Durso and De Hertogh, 1977; Konishi and Inaba, 1964,

Modeling Temperature and Photoperiod Effects on Growth and Development of Dahlia