摘要
为探究不同品系杉木幼林侧枝生长发育特征的差异及其与内源激素的相关性,筛选出适合无节材培育的杉木品系,以6个品系(德昌杉、垂枝杉、洋063、红心杉、洋020和洋061)的3年生杉木试验林为研究对象,对不同品系杉木侧枝发育特征进行调查,并取样测定其内源激素含量,比较不同品系杉木侧枝发育特征及其内源激素含量的差异。结果表明:不同品系杉木的枝下高、树干节间距(相邻两轮盘侧枝间的距离)、侧枝数(树干上每轮侧枝的数目)均存在不同程度的差异,其中,洋063和垂枝杉的枝下高较高,垂枝杉和洋020的树干节间距较大,洋020和洋061的侧枝数较少。不同品系杉木侧枝长度、侧枝基径、侧枝角度也存在不同程度的差异,其中,侧枝长度和侧枝基径大小为洋063>洋061>德昌杉>红心杉>洋020>垂枝杉,而侧枝角度大小为垂枝杉>洋020>洋061>洋063>红心杉>德昌杉。不同品系杉木侧枝的细胞分裂素(CTK)含量、生长素(IAA)含量、细胞分裂素含量/生长素含量(CC TK/CI AA)均存在不同程度的差异,但不同品系杉木侧枝中没有检测到独脚金内酯(SLs)。不同品系杉木侧枝生长指标与其内源激素指标之间存在不同程度的相关性,内源激素会影响植物侧枝的生长,CTK会促进杉木侧枝的生长,而IAA则对杉木侧枝的生长表现出抑制作用,二者在杉木侧枝生长过程中具有明显的拮抗作用。
The objectives of this study were to determine the differences in growth and developmental characteristics of the lateral branches of different Chinese fir strains and their correlation with endogenous hormones and to select Chinese fir strains suitable for the cultivation of knotless timber. Three-year-old Chinese fir of six different strains (Cunninghamia unicanaliculata, Chuizhisha, Yang 063, Hongxinsha, Yang 020, and Yang 061) were collected from a forest to serve as the research subjects. The developmental characteristics of the lateral branches of the different Chinese fir strains were investigated, and the endogenous hormone content of the lateral branches was measured. The results showed that the Chinese fir strains differed in under branch height, internode length of trunk (distance between two adjacent lateral branches), and number of lateral branches (number of lateral branches per round on the trunk). Among them, Yang 063 and Chuizhisha had the greatest under branch height;Chuizhisha and Yang 020 had the largest internode length;and Yang 020 and Yang 061 had the fewest lateral branches per round. The strains of Chinese fir also differed in the length, base diameter, and angle of lateral branches. The values of the lateral branch length and base diameter of the Chinese fir strains were ranked as follows: Yang 063> Yang 061> C. unicanaliculata> Hongxinsha> Yang 020> Chuizhisha;the values of the lateral branch angle of the Chinese fir strains were ranked as follows: Chuizhisha> Yang 020> Yang 061> Yang 063> Hongxinsha> C. unicanaliculata. Cytokinin, indoleacetic acid, and C_(CTK)/C_(IAA) contents in the lateral branches of the Chinese fir strains also differed;however, strigolactone was not detected in the lateral branches of Chinese fir. There were different degrees of correlation between the lateral branch growth indexes and endogenous hormone indexes of the different Chinese fir strains, endogenous hormones can affect the growth of lateral branches of plants, CTK promoted the growth of lateral branche
作者
黄丽娜
江宇
范福金
李明
吴鹏飞
马祥庆
HUANG Lina;JIANG Yu;FAN Fujin;LI Ming;WU Pengfei;MA Xiangqing(College of Forestry,Fujian Agriculture and Forestry University,Fuzhou,Fujian 350002,China;Chinese Fir Engineering Technology Research Center of National Forestry and Grassland Bureau,Fuzhou,Fujian 350002,China;Fujian Yangkou State-owned Forest Farm,Shunchang,Fujian 353200,China)
出处
《森林与环境学报》
CSCD
北大核心
2022年第6期561-568,共8页
Journal of Forest and Environment
基金
国家重点研发项目“杉木大径级无节良材培育技术”(2021YFD2201302)。
关键词
杉木
侧枝发育
枝下高
节间距
品系
内源激素
Chinese fir
lateral branch growth
height under branch
internode length
strain
endogenous hormones
