用抗赤霉素植物生长调节剂处理盆栽斑马植物和英属植物可减缓室内绿壁茎伸长

IF 1 4区 农林科学 Q3 HORTICULTURE
Lane W. Wiens, K. Williams
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引用次数: 0

摘要

在商业室内绿墙中,在低室内光照水平下,由于茎伸长而需要进行植物修剪和更换,这是劳动密集型的,成本高昂。抗赤霉素植物生长调节剂(PGRs)可以减缓茎的伸长,从而降低这种环境下的维护成本。在实验1中,在安装在绿墙上之前,立即将两种PGR作为叶面喷雾或淋液施用于三种蜘蛛窝选择[两种斑马植物(紫露草)和一种英寸植物(紫露草)],每种比例为:25、100和200 mg·L−1的安西米多(ANC)叶面喷雾;多效唑叶面喷雾20、80和160 mg·L−1;PBZ在1、4和8mg·L−1时与未经处理的对照组一起浸泡。在试验2中,对“勃艮第”斑马植株进行了80 mg·L−1 PBZ叶面喷雾、1 mg·L–1 PBZ亚灌溉4次以及这两种处理的组合评价。在两个实验中,植物都被放置在垂直的模块化托盘内部绿色墙壁中。在安装3个月后,每14天测量一次总茎和比节间长度的变化,以计算每月的生长量。在安装后的第一个月,施用抗赤霉素减缓了蜘蛛端口选择的节间伸长。抗赤霉素在斑马植株上更有效地降低了茎的整体生长速率,而在英寸植株上则不那么有效。在三个蜘蛛窝选择中,25 mg·L−1的ANC叶面喷雾与对照相比,生长速度没有差异,尽管100至200 mg·L–1的叶面喷雾是有效的。根据两个实验的结果,中等和高剂量的PBZ,无论是作为叶面喷雾还是淋水,都会导致茎伸长的类似降低。PBZ以20至80 mg·L−1叶面喷雾、4 mg·L–1在安装在墙上之前淋水的形式施用,或者80 mg·L−1 PBZ安装前叶面喷雾和通过下灌溉重复施用1 mg·L–1的组合(四次)对蜘蛛口的生长抑制至少有效3个月。即使是160 mg·L−1叶面喷雾或8 mg·L–1淋水的PBZ在处理过的植物中也没有表现出植物毒性,可以考虑使用。我们建议在安装前使用80 mg·L−1叶面喷雾或4 mg·L–1淋水,以控制蜘蛛口选择中的茎生长。在安装在绿色墙壁上之前,将抗赤霉素PGR应用于植物,可以减缓茎的生长,并有助于降低维护成本。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Treatment of Potted Zebra Plant and Inch Plant with Antigibberellin Plant Growth Regulators Slows Stem Elongation in an Interior Green Wall
In commercial interior green walls, plant trimming and replacement necessitated by stem elongation under low interior light levels is labor intensive and costly. Antigibberellin plant growth regulators (PGRs) may slow stem elongation and thus reduce maintenance costs in this environment. In Expt. 1, two PGRs were applied as foliar spray or drench to three spiderwort selections [two of zebra plant (Tradescantia zebrina) and one of inch plant (Tradescantia fluminensis)] immediately before installation in a green wall, each at three rates: ancymidol (ANC) foliar spray at 25, 100, and 200 mg·L−1; paclobutrazol (PBZ) foliar spray at 20, 80, and 160 mg·L−1; and PBZ drench at 1, 4, and 8 mg·L−1, along with an untreated control. In Expt. 2, 80 mg·L−1 PBZ foliar spray, 1 mg·L−1 PBZ applied via subirrigation four times, and the combination of these two treatments, was evaluated on ‘Burgundy’ zebra plant. In both experiments, plants were placed in a vertical modular tray interior green wall. Change in total stem and specific internode length were measured every 14 days after installation for 3 months to calculate growth per month. Antigibberellin application slowed internode elongation of spiderwort selections during the first month after installation. Antigibberellins were more effective in zebra plant at reducing overall stem growth rate and less so on inch plant. Across the three spiderwort selections, 25 mg·L−1 foliar spray of ANC resulted in no difference in growth rate when compared with the control, although 100 to 200 mg·L−1 foliar spray was effective. Based on the results of both experiments, moderate and high rates of PBZ, applied both as a foliar spray and drench, resulted in similar reduction in stem elongation. PBZ applied as 20 to 80 mg·L−1 foliar spray, 4 mg·L−1 drench before installation in the wall, or a combination of an 80 mg·L−1 PBZ pre-installation foliar spray and recurring 1 mg·L−1 via subirrigation (four times) were effective at growth suppression of spiderworts for at least 3 months. Even rates of PBZ of 160 mg·L−1 foliar spray or 8 mg·L−1 drench did not show phytotoxicity in treated plants and could be considered for use. We recommend a pre-installation application of 80 mg·L−1 foliar spray or 4 mg·L−1 drench for controlling stem growth across spiderwort selections. Application of antigibberellin PGRs to plants before installation in green walls slows stem growth and can contribute to reduced maintenance costs.
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来源期刊
Horttechnology
Horttechnology 农林科学-园艺
CiteScore
2.30
自引率
10.00%
发文量
67
审稿时长
3 months
期刊介绍: HortTechnology serves as the primary outreach publication of the American Society for Horticultural Science. Its mission is to provide science-based information to professional horticulturists, practitioners, and educators; promote and encourage an interchange of ideas among scientists, educators, and professionals working in horticulture; and provide an opportunity for peer review of practical horticultural information.
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