Effects of temperature on photosynthesis and plant growth in the assimilation shoots of a rose

Abstract

The effects of temperature on photosynthesis, ribulose-bisphosphate carboxylase (Rubisco) content and whole plant growth were investigated in the assimilation shoots of a rose (Rosa hybrida L.). Assimilation shoots were grown at two different day/night temperature regimes of 20/15°C (LT) and 30/25°C (HT) for 42 days after 1-month growth. Although LT initially suppressed the photosynthetic rate during the first 7 days, prolonged growth at LT enhanced potential photosynthesis. This was associated with increases in Rubisco and N contents at the level of a single leaf. Rubisco content and the photosynthetic rate at 25°C were 2.8-fold and 1.6-fold higher in the LT plants than in the HT plants at day 42, respectively. The relative growth rate at the level of the whole plant was lower in the LT plants during the first 28 days and the leaf area ratio was smaller in the LT plants throughout the experiment. However, enhanced photosynthesis during growth at LT led to increases in the net assimilation rate at the level of the whole plant, and final biomass at day 42 did not differ between the two temperature treatments. To enhance the photosynthetic capacity in assimilation shoots of a rose, cultivation at 20/15°C is better than cultivation at 30/25°C.

Effects of low temperature and drought on the physiological and growth changes in oil palm seedlings

“…Moreover, it is well known that plant structural modifications and growth pattern adjustments are useful indices of the conesquences of stress environment (Bandurska, 2000;Rauf, 2008;Ushio et al, 2008). Therefore, plants adapt to low temperature and water stress by mediations of these substances.…”

Influence of Growing Temperature on Dry Matter Accumulation in Plant Parts of ^|^lsquo;Siberia^|^rsquo; Oriental Hybrid Lily

“…In the CGC experiment, in which RH was maintained at >70%, the low DT/NT of the 20/15°C plants had thick leaves with low SLA and LAR (Table 5). Reduced SLA and LAR under a low temperature environment were also observed in sweet pepper 8 and roses 16,17 . In the TGC experiment, no differences in SLA and LAR were observed (Table 2).…”

“…Low LAR and SLA alone may lead to a reduction of photosynthesis. Photosynthetic assimilation in rose plants grown under low temperatures with low LAR and SLA was compensated by increased NAR through high ribulose-1, 5-bisphosphate carboxylase/oxygenase content and/or high stomatal leaf conductance in leaves 16,17 . The results of the few studies conducted on photosynthesis in Oriental hybrid lilies are not in accord.…”

“…This report is part of a study dealing with the effects of growing temperature where both day temperature (DT) and night temperature JARQ 47 (4) 2013 436 (NT) were changed simultaneously. We also applied growth analysis to this study as previously applied to other ornamental plants such as roses 16,17 and tulips 5 .…”

The Effects of Day and Night Temperature on the Dry Matter Accumulation of Oriental Hybrid Lily ‘Siberia’ as they Relate to the Photosynthetic and Respiratory Characteristics

“…From the DW and LA values, the leaf area ratio (LAR: LA per unit of total plant DW in cm 2 g -1 ), the specific LA (SLA: LA per unit of leaf DW in cm 2 g -1 ), the relative growth rate (RGR: rate of increase in total plant DW per unit of total plant DW in mg g -1 day -1 ), and the net assimilation rate (NAR: rate of increase in total plant DW per unit of LA in g m -2 day -1 ) were calculated as follows (Inamoto et al 2010, Ushio et al 2008 where, Aleaf is the LA (cm 2 or m 2 ), Wtotal is the total plant DW (g or mg), Wleaf is the leaf DW (g), t is the time (day), and the subscript numerals represent the time (1 = initial, 2 = final).…”