Chitosan Oligosaccharide Addition to Buddhist Pine (<i>Podocarpus macrophyllus</i> (Thunb) Sweet) under Drought: Reponses in Ecophysiology and δ<sup>13</sup>C Abundance
Climate warming induces the necessity to increase the drought resistance of shade-obligate juvenile trees in sub-tropical forests. Chitosan oligosaccharide (COS) is a biopolymer derived from the marine resource that has attracted accumulative attention to induce and promote a plant’s resistance to a...
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| Format: | Article |
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MDPI AG
2020-05-01
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| Series: | Forests |
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| Online Access: | https://www.mdpi.com/1999-4907/11/5/526 |
| _version_ | 1797568521271508992 |
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| author | Chunxia He Yan Zhao Jinsong Zhang Jun Gao |
| author_facet | Chunxia He Yan Zhao Jinsong Zhang Jun Gao |
| author_sort | Chunxia He |
| collection | DOAJ |
| description | Climate warming induces the necessity to increase the drought resistance of shade-obligate juvenile trees in sub-tropical forests. Chitosan oligosaccharide (COS) is a biopolymer derived from the marine resource that has attracted accumulative attention to induce and promote a plant’s resistance to abiotic stress. Buddhist pine (<i>Podocarpus mascrophyllus</i> (Thunb)Sweet) seedlings were cultured as the model material whose natural distribution in sub-tropical areas of China has suffered severe summer drought events in the last 113 years. A split-block design was conducted with a simulated drought event (drought vs. irrigated control), the COS addition, and two samplings at the ends of drought and re-watered treatments. The COS addition increased the resistance to drought by inducing a starch allocation towards roots where δ<sup>13</sup>C abundance and antioxidant enzyme activities were upregulated. The COS addition can promote biomass allocation to roots and increase the number of new roots. The COS addition to drought-treated Buddhist pine seedlings resulted in robust diameter growth. Therefore, COS is an available polymer to promote the resistance of Buddhist pine to drought. More work is suggested to clarify the dose of COS addition that can induce a prominent response of biomass accumulation and carbohydrate metabolism. |
| first_indexed | 2024-03-10T19:58:08Z |
| format | Article |
| id | doaj.art-1720638752664d3d8d7c65801366d952 |
| institution | Directory Open Access Journal |
| issn | 1999-4907 |
| language | English |
| last_indexed | 2024-03-10T19:58:08Z |
| publishDate | 2020-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Forests |
| spelling | doaj.art-1720638752664d3d8d7c65801366d9522023-11-19T23:47:04ZengMDPI AGForests1999-49072020-05-0111552610.3390/f11050526Chitosan Oligosaccharide Addition to Buddhist Pine (<i>Podocarpus macrophyllus</i> (Thunb) Sweet) under Drought: Reponses in Ecophysiology and δ<sup>13</sup>C AbundanceChunxia He0Yan Zhao1Jinsong Zhang2Jun Gao3Key Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, ChinaKey Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, ChinaKey Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, ChinaKey Laboratory of Tree Breeding and Cultivation of State Forestry Administration, Research Institute of Forestry, Chinese Academy of Forestry, Beijing 100091, ChinaClimate warming induces the necessity to increase the drought resistance of shade-obligate juvenile trees in sub-tropical forests. Chitosan oligosaccharide (COS) is a biopolymer derived from the marine resource that has attracted accumulative attention to induce and promote a plant’s resistance to abiotic stress. Buddhist pine (<i>Podocarpus mascrophyllus</i> (Thunb)Sweet) seedlings were cultured as the model material whose natural distribution in sub-tropical areas of China has suffered severe summer drought events in the last 113 years. A split-block design was conducted with a simulated drought event (drought vs. irrigated control), the COS addition, and two samplings at the ends of drought and re-watered treatments. The COS addition increased the resistance to drought by inducing a starch allocation towards roots where δ<sup>13</sup>C abundance and antioxidant enzyme activities were upregulated. The COS addition can promote biomass allocation to roots and increase the number of new roots. The COS addition to drought-treated Buddhist pine seedlings resulted in robust diameter growth. Therefore, COS is an available polymer to promote the resistance of Buddhist pine to drought. More work is suggested to clarify the dose of COS addition that can induce a prominent response of biomass accumulation and carbohydrate metabolism.https://www.mdpi.com/1999-4907/11/5/526drought-resistancesoluble sugarsfine root morphologyseedling growthbiomass allocationPOD |
| spellingShingle | Chunxia He Yan Zhao Jinsong Zhang Jun Gao Chitosan Oligosaccharide Addition to Buddhist Pine (<i>Podocarpus macrophyllus</i> (Thunb) Sweet) under Drought: Reponses in Ecophysiology and δ<sup>13</sup>C Abundance Forests drought-resistance soluble sugars fine root morphology seedling growth biomass allocation POD |
| title | Chitosan Oligosaccharide Addition to Buddhist Pine (<i>Podocarpus macrophyllus</i> (Thunb) Sweet) under Drought: Reponses in Ecophysiology and δ<sup>13</sup>C Abundance |
| title_full | Chitosan Oligosaccharide Addition to Buddhist Pine (<i>Podocarpus macrophyllus</i> (Thunb) Sweet) under Drought: Reponses in Ecophysiology and δ<sup>13</sup>C Abundance |
| title_fullStr | Chitosan Oligosaccharide Addition to Buddhist Pine (<i>Podocarpus macrophyllus</i> (Thunb) Sweet) under Drought: Reponses in Ecophysiology and δ<sup>13</sup>C Abundance |
| title_full_unstemmed | Chitosan Oligosaccharide Addition to Buddhist Pine (<i>Podocarpus macrophyllus</i> (Thunb) Sweet) under Drought: Reponses in Ecophysiology and δ<sup>13</sup>C Abundance |
| title_short | Chitosan Oligosaccharide Addition to Buddhist Pine (<i>Podocarpus macrophyllus</i> (Thunb) Sweet) under Drought: Reponses in Ecophysiology and δ<sup>13</sup>C Abundance |
| title_sort | chitosan oligosaccharide addition to buddhist pine i podocarpus macrophyllus i thunb sweet under drought reponses in ecophysiology and δ sup 13 sup c abundance |
| topic | drought-resistance soluble sugars fine root morphology seedling growth biomass allocation POD |
| url | https://www.mdpi.com/1999-4907/11/5/526 |
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