Chrysanthemum dry matter partitioning patterns along irradiance and temperature gradients

Abstract

. Chrysanthemum dry matter partitioning patterns along irradiance and temperature gradients. pan.^J. Plant Sci. 72: 307 316. The influence of photosynthetic photon flux (PPF,.6 mol d -' m -') and day (DT) and night (NT) temperature (10-30'C) on dry matter accumulation and partitioning was studied in Chrysanthemum morifolium Ramat. 'Bright Golden Anne'. Total plant dry matter varied from 3.6 to 17.2 g at flowering. Plants with the greatest dry matter were from treatments with high PPF levels and temperatures. Accumulation of dry matter in roots, stems, leaves and flowers examined on a normalized time and normalized dry matter basis showed similar trends independent of DT, NT and PPF during development. Accumulated dry matter in roots, stems and leaves increased to a maximum and then decreased as the flowers were developing.Maximum leaf, root and stem dry matter was reached at 81, 85 and9l%, respectively, of required time from staft of short days (SD) to flower. Proportion root dry matter increased and proportion leaf dry matter decreased in the plants as PPF

Growth and Development of Basil Species in Response to Temperature

“…Although plant responses to temperature ranging from T b to T max are nonlinear, growth and development between T b and T opt is not, and it is referred to as the linear range. Temperature models have been developed to improve floriculture crop scheduling and production (Fisher et al, 1996;Kaczperski et al, 1991;Karlsson and Heins, 1992;Lopez and Runkle, 2004;Moccaldi and Runkle, 2007;Torres and Lopez, 2011). Marketing and production of containerized or hydroponically grown basil are not dependent on flowering; rather, basil is sold when plants attain sufficient weight or size.…”

Quantifying the effects of hydroponic systems, nutrient solution, and air temperature on growth and development of basil (Ocimum L.) species

“…Though greenhouse temperatures fluctuate throughout the day, plants are able to integrate the temperature, therefore, we use ADT to model temperature effects. Temperature models have been developed to determine the rate of vegetative growth and development such as leaf unfolding rate, plant height, number of branches, and shoot and root dry mass (Kaczperski et al, 1991;Karlsson and Heins, 1992;Lopez and Runkle, 2004;Scaife, 1973;Thomson et al, 1998).…”

“…The ADT is the average temperature over a 24 h period and primarily controls the rate of plant development (Blanchard and Runkle, 2011). Temperature models have been developed to assist in scheduling the flowering of crops (Fisher et al, 1996;Moccaldi and Runkle, 2007;Torres and Lopez, 2011) as well as determining the rate of vegetative growth and development such as leaf unfolding rate, plant height, number of branches, and shoot and root dry mass (Kaczperski et al, 1991;Karlsson and Heins, 1992;Lopez and Runkle, 2004). Marketing containerized or hydroponically grown basil is not related to flowering, but rather the mass and size of the plant.…”

Cultivars, conduction, photoperiodic and quality chrysanthemum in Brazil

“…Total plant mass was found to decrease (Karlsson and Heins, 1992), remain constant (Tsujita et al, 1981;Carvalho et al, 2005) or to increase (Tsujita et al, 1981;Lepage et al, 1984) with decreasing temperatures. Because temperature influences plant development, it also influences partitioning of assimilates to different plant organs.…”