| Effects of nitric oxide on photosynthesis and physiological characteristics of apple rootstocks under water stress |
|
View Fulltext View/Add Comment Download reader |
| |
| DOI：10.7606/j.issn.1000-7601.2017.04.38 |
| Key Words: water stress apple root stock nitrick oxide photosynthesis physiological index |
| Author Name | Affiliation | | SHI Xiao-yun | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | WANG Yan-xiu | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | Jiang Xiao | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | CHEN Bai-hong | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | HU Ya | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | ZHU Yan-fang | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China | | HE Cheng-yong | College of Agronomy, Gansu Agricultural University, Lanzhou, Gansu 730070, China |
|
| Hits: 1876 |
| Download times: 1325 |
| Abstract: |
| The study aims to explore physiological effects of exogenous nitric oxide (nitric oxide, NO) on apple rootstocks under water stress and to clarify the differences of photosynthetic, physiological and biochemical indexes of apple rootstock after different concentrations of exogenous NO treatments. The 10-leaf age of M. sieverii (Ledeb) Roem seedlings were tested as experiment materials, and the pot experiment which combined with artificial water control was carried. In the moderate water stress (water content is 45%～55% of the soil field capacity) conditions, after spraying exogenous NO, the photosynthetic rate (Pn) and other photosynthetic characteristic indexs, antioxidant enzymes activity such as SOD and the content of osmotic stress substances such as Pro were measured by pot experiment. Compared with the control, exogenous NO slowed the upward trend of MDA and Pro content, conductivity, intercellular CO2 concentration and POD activity under water stress, and cut the decreasing rate of Pn, stomatal conductance (Gs), transpiration rate (Tr), SOD and CAT activity. It was detected a significant effect of concentration, with 190 μmol·L-1 NO having the largest effect. Pn, Gs, Tr, SOD and CAT activities increased by 28.73%,32.94%,33.33%,14.24%,25.38%; Ci,POD activity, Pro content, REC and MDA contents were decreased by 18.68%,40%,78.72%,49.06%,26.47%. Appropriate concentrations of NO treatment can activate M. prunifolia seedlings of antioxidant system, protect the cell membrane system and enhanced cell photosynthetic performance under water stress. |
|
|
|