多效唑、矮壮素对木棉苗木矮化效果的研究  

The dwarfing effect of paclobutrazol and chlormequat on Bombax ceiba seedlings

作　　者：罗晓滔 赵冬 胡世俊[1] 马焕成[1] LUO Xiao-tao;ZHAO Dong;HU Shi-jun;MA Huan-cheng(Southwest Biodiversity Conservation Key Laboratory of State Forest Administration,Southwest Forestry University,Kunming 650224,Yunnan,China)

机构地区：[1]西南林业大学西南地区生物多样性保育国家林业局重点实验室,云南昆明650224

出　　处：《云南大学学报（自然科学版）》2021年第1期174-181,共8页Journal of Yunnan University(Natural Sciences Edition)

基　　金：西南林业大学木棉纤维人工林产业化培育省创新团队项目(2018CH014);国家自然科学基金(31560207,31260175);云南省“云岭教学名师”培育项目.

摘　　要：木棉是干热河谷许多地区的建群种,对该地区的生态稳定起到重要的作用.木棉具有春季先花后叶和花色艳丽的特点,观赏价值较高.木棉为高大乔木,若能通过人为处理矮化成盆苗,将具有极高的商业价值.试验采用盆栽试验,从木棉幼苗开始,对木棉苗木以不同浓度的多效唑(PP333)和矮壮素(CCC)2种植物生长延缓剂,进行灌根处理,以清水为对照,比较其矮化效果.结果表明,两种延缓剂和不同的质量浓度对苗高生长和基径生长的影响存在显著差异.PP333处理以200 mg/L对苗高生长的矮化效果最好,250 mg/L次之;在CCC处理中,2500 mg/L对苗高生长的矮化效果最好,1500 mg/L次之.PP333处理在抑制了高生长的同时也抑制了基径的生长,CCC则起到了促进基径生长的效果.因此,建议在对木棉苗木进行矮化处理时,可以在种子萌发后用PP333处理,以抑制苗高生长;在90 d后施用CCC,以促进木棉的基径发育.Bombax ceiba is an established species in dry-hot valleys,playing an important role on the ecological stability;Bombax ceiba is an important ornamental tree plant but very tall.In order to dwarf the tall tree into pot seedlings through artificial treatment for higher commercial value,potted experiments were adopted.Pleiotrazole(PP333),chlormequat(CCC)with different concentrations and water were applied from the beginning of Bombax ceiba seedlings by root irrigation treatment.The difference between the three treatment groups was studied.The results showed that there was significant difference between the effect of two kinds of retarders by different concentrations in seedling height and basal diameter.PP333 treatment with 200 mg/L had the best dwarfing effect on high growth,followed by 250 mg/L.Under CCC treatment,2500 mg/L had the best dwarfing effect on high growth,followed by 1500 mg/L.However,PP333 inhibited the growth of basal diameter as well as the high growth,while CCC promoting the growth of basal diameter.Therefore,it is suggested that in the dwarfing treatment of Bombax ceiba seedlings,PP333 could be used after seed germination to inhibit seedling height growth and CCC should be applied to promote the basal diameter development of Bombax ceibas 90 days later.

关 键 词：木棉 多效唑 矮壮素 矮化 

分 类 号：S722[农业科学—林木遗传育种]