文献类型： 外文期刊

作者： Chang, Yunni ¹ ; Xue, Ting ³ ; Penuelas, Josep ⁴ ; Sardans, Jordi ⁴ ; Zhou, Junxin ⁶ ; Zhou, Yang ¹ ; Xu, Chaobin ¹ ; Zheng, Xueyan ⁷ ; Peng, Wangxun ⁷ ; Deng, Yanbing ⁸ ; Zhong, Quanlin ¹ ; Li, Baoyin ¹ ;

作者机构： 1.Fujian Normal Univ, Coll Geog Sci, Fuzhou 350007, Peoples R China

2.Fujian Acad Agr Sci, Tea Res Inst, Fuzhou 350012, Peoples R China

3.Fujian Normal Univ, Southern Inst Oceanog, Ctr Engn Technol Res Microalga Germplasm Improveme, Fuzhou 350007, Peoples R China

4.CREAF, Cerdanyola Del Valles 08193, Barcelona, Spain

5.UAB, Global Ecol Unit, CREAF, CSIC,CSIC, Barcelona 08193, Spain

6.Fujian Forestry Vocat Tech Coll, Dept Forestry, Nanping 353000, Peoples R China

7.Yangkou State owned Forest Farm, Nanping 353000, Peoples R China

8.Nanping Green Forestry Co Ltd, Nanping 353000, Peoples R China

关键词： Adventitious root development; Rejuvenation; Cutting orchard; Scions; Cunninghamia lanceolata

期刊名称：FOREST ECOLOGY AND MANAGEMENT （ 影响因子：3.7； 五年影响因子：3.9 ）

ISSN： 0378-1127

年卷期： 2024 年 563 卷

页码：

收录情况： SCI

摘要： Chinese fir is the most important evergreen coniferous species for afforestation in subtropical China due to rapid growth and excellent timber quality. Plant cutting propagation plays key role in the vegetative propagation, and is more practical for rejuvenation. This study was focused on understanding the influencing mechanism of adventitious root formation, and we investigated rooting capacity of different scion methods in two different cutting orchards. The results showed that TC (the cuttings from the cutting orchard of "burying trunk with crown") has highest rooting capacity, indicating the cutting orchard has better rejuvenation effect. The ascorbate peroxidase (APX activity), Jasmonic acid (JA) and N-((-)-jasmonoyl)-S-isoleucine [JA-Ile] of cutting phloem were correlated to rooting capacity. The genes involved in the plant hormone signal pathway showed different regulation to rejuvenation, differentially expressed genes (DEGs) in indole-3-acetic acid (IAA) and Brassinosteroid (BR)-related pathway were mostly upregulated, while DEGs in abscisic acid (ABA) and gibberellins (GA)related pathway were mostly downregulated. Phenylpropanoid biosynthesis and terpenoid backbone biosynthesis genes were significantly up-related in roots, the DFR (dihydroflavonol 4-reductase) genes in flavonoid biosynthesis were upregulated in seedlings submitted to treatments with higher degree of rejuvenation with respect to seedlings submitted to lower degree of rejuvenation. Through weighted gene co-expression network analysis (WGCNA) analysis, we identified key genes including SAUR, A-ARR, HDR, HDS and POX. The SEM model indicated different scions directly positively affected rooting, APX activity and HDR gene, and cutting phloem JA negatively affected rooting. These results lay the foundation for further studies on rejuvenation in woody plants, and open new avenues for increasing the efficiency of vegetative propagation of other woody species.