Photosynthetic Characteristics of Three Different Colors of Leaves of Bambusa multiplex cv.Silverstrip
To understand the photosynthetic characteristics and reach the full production potential, photosynthetic pigment contents, light response curves, gas exchanges and carbon dioxide response curves of green leaves (GL), striped leaves (SL), and white leaves (WL) of one-year-old Bambusa multiplex cv. Silverstrip potted seedlings were measured, analyzed, and compared. For the photosynthetic pigments, that is, chlorophyll a (Chl a), chlorophyll b (Chl b) and carotenoids (Car), chlorophyll a+b (Chl a+b), chlorophyll a/b (Chl a/b) and chlorophyll a+b/carotenoids (Chl a+b/Car), the order of the contents of these parameters among the three-color leaves was GL>SL>WL. The initial quantum efficiency (α) and maximum net photosynthetic rate of GL was significantly higher than those of SL (P<0.05), without significant difference in dark respiration rate between GL and SL. The light saturation point and light compensation point of SL was higher than those of GL, but the difference was not significant (P>0.05). The initial carboxylation efficiency (CE), photosynthetic capacity (Amax), CO2saturation point (CSP) and photorespiration rate (Rp) of GL was higher than SL, while SL had higher CO2compensation point (CCP). The stomatal conductance(Gs), transpiration rate (Tr), and water use efficiency (WUE) increased with photosynthetic active radiation, and the order of these rates among three types of leaves was GL>SL>WL, while for intercellular CO2concentration (Ci), the variation trend among the leaves was reversed GL<SL<WL. Based on either the light response curve or the CO2response curve, GL had higher photosynthetic capacity than SL. The higher photosynthetic capacity was related to the high chlorophyll content in the GL. Moreover, SL had higher capacity to use the bright light compared with GL, which indicated that in greenhouses, using artificial lighting to increase light intensity, more striped leaves B.multiplex cv.Silverstrip might be developed and produced.
国家科技期刊平台
NSTL
万方数据
维普
