Effects of Cytokinin and Nitrogen on Drought Tolerance of Creeping Bentgrass.
Cytokinin (CK) is a vital plant hormone that controls many aspects of growth and development in plants. Nitrogen (N) is the indispensable macronutrient needed in plants and also one of the most important limiting factors for plant growth. This study was designed to investigate the simultaneous effec...
| Main Authors: | , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2016-01-01
|
| Series: | PLoS ONE |
| Online Access: | http://europepmc.org/articles/PMC4839601?pdf=render |
| _version_ | 1828425749755854848 |
|---|---|
| author | Zhihui Chang Yang Liu Hui Dong Ke Teng Liebao Han Xunzhong Zhang |
| author_facet | Zhihui Chang Yang Liu Hui Dong Ke Teng Liebao Han Xunzhong Zhang |
| author_sort | Zhihui Chang |
| collection | DOAJ |
| description | Cytokinin (CK) is a vital plant hormone that controls many aspects of growth and development in plants. Nitrogen (N) is the indispensable macronutrient needed in plants and also one of the most important limiting factors for plant growth. This study was designed to investigate the simultaneous effects of CK and N on the visual turf quality and antioxidant metabolism of drought-stressed creeping bentgrass (Agrostis stolonifera L.). 'PennA-4' creeping bentgrass treated with trans-zeatin riboside at three rates of CK concentrations of 0, 10 and 100 μM (designated by CK0, 10, and 100) and two nitrogen rates with 2.5 and 7.5 kg N·ha-1 every 15 days (designated by low and high N) in a complete factorial arrangement was grown under two soil moisture regimes: well-watered and drought stress. Exogenous CK improved turf quality and delayed leaf wilting under drought stress, especially under high N. The grasses treated with CK10 and CK100 had lower O2- production and H2O2 concentration than those without CK treatment. The CK100 treatment enhanced the activities of superoxide dismutase (SOD), ascorbate peroxidase (APX), catalase (CAT), and guaiacol peroxidase (POD) by 25%, 22%, 17% and 24%, respectively, relative to CK0. Moreover, the activity changes of the antioxidant enzyme isoforms were more significant under high N condition relative to low N condition. Our results demonstrated the beneficial impacts of CK and N on physiological reactions, especially antioxidant metabolism, and foliar application of CK at 10 or 100 μM plus 7.5 kg ha-1 N biweekly may improve drought stress resistance of creeping bentgrass. |
| first_indexed | 2024-12-10T16:36:35Z |
| format | Article |
| id | doaj.art-778903a6989642748c98562e9e48d5c6 |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-12-10T16:36:35Z |
| publishDate | 2016-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-778903a6989642748c98562e9e48d5c62022-12-22T01:41:24ZengPublic Library of Science (PLoS)PLoS ONE1932-62032016-01-01114e015400510.1371/journal.pone.0154005Effects of Cytokinin and Nitrogen on Drought Tolerance of Creeping Bentgrass.Zhihui ChangYang LiuHui DongKe TengLiebao HanXunzhong ZhangCytokinin (CK) is a vital plant hormone that controls many aspects of growth and development in plants. Nitrogen (N) is the indispensable macronutrient needed in plants and also one of the most important limiting factors for plant growth. This study was designed to investigate the simultaneous effects of CK and N on the visual turf quality and antioxidant metabolism of drought-stressed creeping bentgrass (Agrostis stolonifera L.). 'PennA-4' creeping bentgrass treated with trans-zeatin riboside at three rates of CK concentrations of 0, 10 and 100 μM (designated by CK0, 10, and 100) and two nitrogen rates with 2.5 and 7.5 kg N·ha-1 every 15 days (designated by low and high N) in a complete factorial arrangement was grown under two soil moisture regimes: well-watered and drought stress. Exogenous CK improved turf quality and delayed leaf wilting under drought stress, especially under high N. The grasses treated with CK10 and CK100 had lower O2- production and H2O2 concentration than those without CK treatment. The CK100 treatment enhanced the activities of superoxide dismutase (SOD), ascorbate peroxidase (APX), catalase (CAT), and guaiacol peroxidase (POD) by 25%, 22%, 17% and 24%, respectively, relative to CK0. Moreover, the activity changes of the antioxidant enzyme isoforms were more significant under high N condition relative to low N condition. Our results demonstrated the beneficial impacts of CK and N on physiological reactions, especially antioxidant metabolism, and foliar application of CK at 10 or 100 μM plus 7.5 kg ha-1 N biweekly may improve drought stress resistance of creeping bentgrass.http://europepmc.org/articles/PMC4839601?pdf=render |
| spellingShingle | Zhihui Chang Yang Liu Hui Dong Ke Teng Liebao Han Xunzhong Zhang Effects of Cytokinin and Nitrogen on Drought Tolerance of Creeping Bentgrass. PLoS ONE |
| title | Effects of Cytokinin and Nitrogen on Drought Tolerance of Creeping Bentgrass. |
| title_full | Effects of Cytokinin and Nitrogen on Drought Tolerance of Creeping Bentgrass. |
| title_fullStr | Effects of Cytokinin and Nitrogen on Drought Tolerance of Creeping Bentgrass. |
| title_full_unstemmed | Effects of Cytokinin and Nitrogen on Drought Tolerance of Creeping Bentgrass. |
| title_short | Effects of Cytokinin and Nitrogen on Drought Tolerance of Creeping Bentgrass. |
| title_sort | effects of cytokinin and nitrogen on drought tolerance of creeping bentgrass |
| url | http://europepmc.org/articles/PMC4839601?pdf=render |
| work_keys_str_mv | AT zhihuichang effectsofcytokininandnitrogenondroughttoleranceofcreepingbentgrass AT yangliu effectsofcytokininandnitrogenondroughttoleranceofcreepingbentgrass AT huidong effectsofcytokininandnitrogenondroughttoleranceofcreepingbentgrass AT keteng effectsofcytokininandnitrogenondroughttoleranceofcreepingbentgrass AT liebaohan effectsofcytokininandnitrogenondroughttoleranceofcreepingbentgrass AT xunzhongzhang effectsofcytokininandnitrogenondroughttoleranceofcreepingbentgrass |