Effects of Different Growth Regulators on the Rooting of <i>Catalpa bignonioides</i> Softwood Cuttings
(1) Background: To further improve the rapid reproduction and large-scale application of <i>Catalpa bignonioides</i>. (2) Methods: With young softwood cuttings from a 3-year-old <i>C. bignonioides</i> mother plant used as materials, the effects of indole-3-acetic acid(IAA), i...
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MDPI AG
2022-08-01
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| Series: | Life |
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| Online Access: | https://www.mdpi.com/2075-1729/12/8/1231 |
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| author | Jin’e Quan Ruoyi Ni Yange Wang Jiajia Sun Mingyue Ma Huitao Bi |
| author_facet | Jin’e Quan Ruoyi Ni Yange Wang Jiajia Sun Mingyue Ma Huitao Bi |
| author_sort | Jin’e Quan |
| collection | DOAJ |
| description | (1) Background: To further improve the rapid reproduction and large-scale application of <i>Catalpa bignonioides</i>. (2) Methods: With young softwood cuttings from a 3-year-old <i>C. bignonioides</i> mother plant used as materials, the effects of indole-3-acetic acid(IAA), indolebutyric acid(IBA) and rhizogenic powder-1(ABT-1) growth regulators at different concentrations on cutting indexes and the dynamic changes in endogenous hormone contents during the rooting of the <i>C. bignonioides</i> cuttings were studied. (3) Results: The rooting of <i>C. bignonioides</i> cuttings could be divided into five stages. There were three types of rooting of adventitious roots. IBA treatment resulted in a high rooting rate and beneficial root morphology. The morphological indexes of the cutting roots after treatment with 1000 mg·L<sup>−1</sup> IBA had the best overall quality, which was significantly higher than that of the roots in the control (CK) group (<i>p</i> < 0.05). Although the average longest root length (20.51 cm) under ABT-1 was the longest, its overall average rooting rate was slightly lower than that under IBA. The rooting effect under IAA was generally lower than that under IBA and ABT-1. The endogenous hormone content of the cuttings was found to be closely related to rooting; the IAA and zeatin nucleoside (ZR) content was high, and the ratios of IAA/ABA and IAA/ZR were high. The contents of gibberellin<sub>3</sub> (GA<sub>3</sub>) and abscisic acid (ABA) were low, which had a promoting effect on the rooting of the cuttings. (5) Conclusions: All three kinds of auxin can promote rooting and, of the three treatment groups, the rooting effect of cuttings in the IBA treatment group was the strongest, with 1000 mg·L<sup>−1</sup> being the optimum concentration. |
| first_indexed | 2024-03-09T09:53:49Z |
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| id | doaj.art-57e06f419a6b4684ae0ee2033152e8e0 |
| institution | Directory Open Access Journal |
| issn | 2075-1729 |
| language | English |
| last_indexed | 2024-03-09T09:53:49Z |
| publishDate | 2022-08-01 |
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| record_format | Article |
| series | Life |
| spelling | doaj.art-57e06f419a6b4684ae0ee2033152e8e02023-12-01T23:54:40ZengMDPI AGLife2075-17292022-08-01128123110.3390/life12081231Effects of Different Growth Regulators on the Rooting of <i>Catalpa bignonioides</i> Softwood CuttingsJin’e Quan0Ruoyi Ni1Yange Wang2Jiajia Sun3Mingyue Ma4Huitao Bi5College of Forest, Henan Agricultural University, Zhengzhou 450002, ChinaCollege of Forest, Henan Agricultural University, Zhengzhou 450002, ChinaCollege of Forest, Henan Agricultural University, Zhengzhou 450002, ChinaCollege of Forest, Henan Agricultural University, Zhengzhou 450002, ChinaCollege of Forest, Henan Agricultural University, Zhengzhou 450002, ChinaCollege of Forest, Henan Agricultural University, Zhengzhou 450002, China(1) Background: To further improve the rapid reproduction and large-scale application of <i>Catalpa bignonioides</i>. (2) Methods: With young softwood cuttings from a 3-year-old <i>C. bignonioides</i> mother plant used as materials, the effects of indole-3-acetic acid(IAA), indolebutyric acid(IBA) and rhizogenic powder-1(ABT-1) growth regulators at different concentrations on cutting indexes and the dynamic changes in endogenous hormone contents during the rooting of the <i>C. bignonioides</i> cuttings were studied. (3) Results: The rooting of <i>C. bignonioides</i> cuttings could be divided into five stages. There were three types of rooting of adventitious roots. IBA treatment resulted in a high rooting rate and beneficial root morphology. The morphological indexes of the cutting roots after treatment with 1000 mg·L<sup>−1</sup> IBA had the best overall quality, which was significantly higher than that of the roots in the control (CK) group (<i>p</i> < 0.05). Although the average longest root length (20.51 cm) under ABT-1 was the longest, its overall average rooting rate was slightly lower than that under IBA. The rooting effect under IAA was generally lower than that under IBA and ABT-1. The endogenous hormone content of the cuttings was found to be closely related to rooting; the IAA and zeatin nucleoside (ZR) content was high, and the ratios of IAA/ABA and IAA/ZR were high. The contents of gibberellin<sub>3</sub> (GA<sub>3</sub>) and abscisic acid (ABA) were low, which had a promoting effect on the rooting of the cuttings. (5) Conclusions: All three kinds of auxin can promote rooting and, of the three treatment groups, the rooting effect of cuttings in the IBA treatment group was the strongest, with 1000 mg·L<sup>−1</sup> being the optimum concentration.https://www.mdpi.com/2075-1729/12/8/1231<i>Catalpa bignonioides</i>softwood cuttinggrowth hormonerooting index |
| spellingShingle | Jin’e Quan Ruoyi Ni Yange Wang Jiajia Sun Mingyue Ma Huitao Bi Effects of Different Growth Regulators on the Rooting of <i>Catalpa bignonioides</i> Softwood Cuttings Life <i>Catalpa bignonioides</i> softwood cutting growth hormone rooting index |
| title | Effects of Different Growth Regulators on the Rooting of <i>Catalpa bignonioides</i> Softwood Cuttings |
| title_full | Effects of Different Growth Regulators on the Rooting of <i>Catalpa bignonioides</i> Softwood Cuttings |
| title_fullStr | Effects of Different Growth Regulators on the Rooting of <i>Catalpa bignonioides</i> Softwood Cuttings |
| title_full_unstemmed | Effects of Different Growth Regulators on the Rooting of <i>Catalpa bignonioides</i> Softwood Cuttings |
| title_short | Effects of Different Growth Regulators on the Rooting of <i>Catalpa bignonioides</i> Softwood Cuttings |
| title_sort | effects of different growth regulators on the rooting of i catalpa bignonioides i softwood cuttings |
| topic | <i>Catalpa bignonioides</i> softwood cutting growth hormone rooting index |
| url | https://www.mdpi.com/2075-1729/12/8/1231 |
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