Effects of Exogenous Ethylene and Cobalt Chloride on Root Growth of Chinese Fir Seedlings under Phosphorus-Deficient Conditions
Studying the effects of different concentrations of ethephon on morphological and physiological changes in the roots of Chinese fir (<i>Cunninghamia lanceolata</i> Lamb. Hook.) seedlings under P deficiency can reveal the internal adaptive mechanisms of these plants under nutrient stress....
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2021
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oai:doaj.org-article:e1aa7675a2b74f42acd187bfecb139fb2021-11-25T17:39:10ZEffects of Exogenous Ethylene and Cobalt Chloride on Root Growth of Chinese Fir Seedlings under Phosphorus-Deficient Conditions10.3390/f121115851999-4907https://doaj.org/article/e1aa7675a2b74f42acd187bfecb139fb2021-11-01T00:00:00Zhttps://www.mdpi.com/1999-4907/12/11/1585https://doaj.org/toc/1999-4907Studying the effects of different concentrations of ethephon on morphological and physiological changes in the roots of Chinese fir (<i>Cunninghamia lanceolata</i> Lamb. Hook.) seedlings under P deficiency can reveal the internal adaptive mechanisms of these plants under nutrient stress. Herein, we investigated the effects of different ethephon and cobalt chloride concentrations under normal P supply and P deficiency. A significant effect (<i>p</i> < 0.05) of exogenous additive application was observed on the development of Chinese fir root length, surface area, and volume. These root development indices showed maximum values when the ethephon concentration was 0.01 g kg<sup>−1</sup> under normal P supply and P deficiency, and they were significantly different from those under 0.04 g kg<sup>−1</sup> ethephon treatment. Similarly, the indices showed maximum values when CoCl<sub>2</sub> concentration was 0.01 g kg<sup>−1</sup> under P deficiency and was significantly different (<i>p</i> < 0.01) from those under 0.2 g kg<sup>−1</sup> CoCl<sub>2</sub> treatment. Under normal P supply, an increase in ethephon concentration caused superoxide dismutase (SOD; E.C. 1.15.1.1) activity to decrease and peroxidase (POD; E.C. 1.11.1.X) activity to increase gradually. Conversely, CoCl<sub>2</sub> addition (0.01 g kg<sup>−1</sup>) promoted SOD and POD activities under P deficiency. There were no significant differences (<i>p</i> > 0.05) in malondialdehyde content of seedlings among ethephon or CoCl<sub>2</sub> treatments. In conclusion, ethylene plays a significant role in adaptative mechanisms underlying stress resistance in plants, prompting them to respond to P starvation and improving seedlings’ tolerance to P-deficient conditions.Hui ZhangNemin WangShanshan ZhengMin ChenXiangqing MaPengfei WuMDPI AGarticleChinese firexogenous ethephonexogenous cobalt chlorideantioxidant enzymesroot morphologyphosphorus stressPlant ecologyQK900-989ENForests, Vol 12, Iss 1585, p 1585 (2021) |
| institution |
DOAJ |
| collection |
DOAJ |
| language |
EN |
| topic |
Chinese fir exogenous ethephon exogenous cobalt chloride antioxidant enzymes root morphology phosphorus stress Plant ecology QK900-989 |
| spellingShingle |
Chinese fir exogenous ethephon exogenous cobalt chloride antioxidant enzymes root morphology phosphorus stress Plant ecology QK900-989 Hui Zhang Nemin Wang Shanshan Zheng Min Chen Xiangqing Ma Pengfei Wu Effects of Exogenous Ethylene and Cobalt Chloride on Root Growth of Chinese Fir Seedlings under Phosphorus-Deficient Conditions |
| description |
Studying the effects of different concentrations of ethephon on morphological and physiological changes in the roots of Chinese fir (<i>Cunninghamia lanceolata</i> Lamb. Hook.) seedlings under P deficiency can reveal the internal adaptive mechanisms of these plants under nutrient stress. Herein, we investigated the effects of different ethephon and cobalt chloride concentrations under normal P supply and P deficiency. A significant effect (<i>p</i> < 0.05) of exogenous additive application was observed on the development of Chinese fir root length, surface area, and volume. These root development indices showed maximum values when the ethephon concentration was 0.01 g kg<sup>−1</sup> under normal P supply and P deficiency, and they were significantly different from those under 0.04 g kg<sup>−1</sup> ethephon treatment. Similarly, the indices showed maximum values when CoCl<sub>2</sub> concentration was 0.01 g kg<sup>−1</sup> under P deficiency and was significantly different (<i>p</i> < 0.01) from those under 0.2 g kg<sup>−1</sup> CoCl<sub>2</sub> treatment. Under normal P supply, an increase in ethephon concentration caused superoxide dismutase (SOD; E.C. 1.15.1.1) activity to decrease and peroxidase (POD; E.C. 1.11.1.X) activity to increase gradually. Conversely, CoCl<sub>2</sub> addition (0.01 g kg<sup>−1</sup>) promoted SOD and POD activities under P deficiency. There were no significant differences (<i>p</i> > 0.05) in malondialdehyde content of seedlings among ethephon or CoCl<sub>2</sub> treatments. In conclusion, ethylene plays a significant role in adaptative mechanisms underlying stress resistance in plants, prompting them to respond to P starvation and improving seedlings’ tolerance to P-deficient conditions. |
| format |
article |
| author |
Hui Zhang Nemin Wang Shanshan Zheng Min Chen Xiangqing Ma Pengfei Wu |
| author_facet |
Hui Zhang Nemin Wang Shanshan Zheng Min Chen Xiangqing Ma Pengfei Wu |
| author_sort |
Hui Zhang |
| title |
Effects of Exogenous Ethylene and Cobalt Chloride on Root Growth of Chinese Fir Seedlings under Phosphorus-Deficient Conditions |
| title_short |
Effects of Exogenous Ethylene and Cobalt Chloride on Root Growth of Chinese Fir Seedlings under Phosphorus-Deficient Conditions |
| title_full |
Effects of Exogenous Ethylene and Cobalt Chloride on Root Growth of Chinese Fir Seedlings under Phosphorus-Deficient Conditions |
| title_fullStr |
Effects of Exogenous Ethylene and Cobalt Chloride on Root Growth of Chinese Fir Seedlings under Phosphorus-Deficient Conditions |
| title_full_unstemmed |
Effects of Exogenous Ethylene and Cobalt Chloride on Root Growth of Chinese Fir Seedlings under Phosphorus-Deficient Conditions |
| title_sort |
effects of exogenous ethylene and cobalt chloride on root growth of chinese fir seedlings under phosphorus-deficient conditions |
| publisher |
MDPI AG |
| publishDate |
2021 |
| url |
https://doaj.org/article/e1aa7675a2b74f42acd187bfecb139fb |
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