We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Influence of different concentration Ni and Cu on the photosynthesis and chlorophyll fluorescence characteristics of Peganum harmala.
- Authors
LU Yan; LI Xin-rong; HE Ming-zhu; SU Yan-gui; ZENG Fan-jiang
- Abstract
A pot experiment was conducted to study the influence of different concentration (0, 50,100, 200, and 400 mg·kg-1) Ni and Cu on the growth, photosynthesis, and chlorophyll fluorescence characteristics of Peganum harmala seedlings. With increasing concentration Ni in the medium, the seedlings growth parameters, photosynthetic pigment content, net photosynthetic rate (Pn), stomatal conductance (Gs ), transpiration rate (Tr ), maximal photochemical efficiency of PS域(Fv / Fm), quantum efficiency of electric transport of PS域(椎PS域), and coefficient of photochemical quenching (qP) of P. harmala decreased significantly, while the intercellular CO2 concentration (Ci) and the coefficient of non鄄photochemical quenching (qN) were in adverse. The decrease of Pn under Ni stress was mainly caused by non鄄stomatal limitation. At 50 mg·kg-1 Cu, the growth parameters, photosynthetic pigment content, Pn, Gs, Tr, Ci, Fv / Fm, 椎PS域, and qP reached their peak values; at 100 mg·kg-1 Cu, the growth parameters, chlorophyll a and b contents, Pn, Gs, Tr, Ci, and Fv / Fm were still slightly higher than the control; while with the further increasing Cu concentration in the medium, all the test indices except qN tended to decrease. The decrease of Pn under Cu stress was mainly caused by stomatal limitation.
- Subjects
PEGANUM harmala; PHOTOSYNTHESIS; NICKEL; COPPER; METAL quenching
- Publication
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao, 2011, Vol 22, Issue 4, p936
- ISSN
1001-9332
- Publication type
Article