[Effects of foliar spraying DA-6 on the photosynthetic rate and plant growth of strawberry in autumn].
With strawberry ' French 3' (Fragaria x ananassa Duch cv. French 3) as test material, this paper studied the effects of foliar spraying DA-6 at the rates of 10, 20 and 30 mg x L(-1) in late autumn on its seedlings net photosynthetic rate, metabolism of reactive oxygen species, and plant growth. Compared with the control, foliar spraying DA-6 of 20 and 30 mg x L(-1) increased the net photosynthetic rate, chlorophyll a and b contents, and SOD and CAT activities significantly, and decreased the reactive oxygen and MDA contents. Moreover, foliar spraying DA-6 of 20 and 30 mg x L(-1) increased the average dry weight per leaf, and the dry mass of shoot and root significantly. The ratio of root to shoot after spraying DA-6 of 20 and 30 mg x L(-1) was 29.9% and 29.3% higher than the control, respectively. Foliar spraying appropriate concentration of DA-6 in late autumn could improve the plant growth of strawberry seedlings.
Miao
Peng-Fei
PF
College of Agronomy and Biotechnology, China Agricultural University, Beijing 100094, China. miaopengfei@126.com
Liu
Guo-Jie
GJ
Li
Shao-Hua
SH
Shan
Shou-Ming
SM
D018533:Biomass; D002374:Catalase / Q000378:metabolism; D002734:Chlorophyll / Q000378:metabolism; D000077194:Chlorophyll A; D031985:Fragaria / Q000187:drug effects* / Q000254:growth & development / Q000502:physiology; D006861:Hydrogen Peroxide / Q000378:metabolism; D010788:Photosynthesis / Q000187:drug effects* / Q000502:physiology; D010937:Plant Growth Regulators / Q000494:pharmacology*; D018515:Plant Leaves / Q000187:drug effects / Q000254:growth & development / Q000502:physiology; D012621:Seasons; D013482:Superoxide Dismutase / Q000378:metabolism
D010937:Plant Growth Regulators; D002734:Chlorophyll; C037184:chlorophyll b; D006861:Hydrogen Peroxide; D002374:Catalase; D013482:Superoxide Dismutase; D000077194:Chlorophyll A