Effects of Photoperiod Treatments on Stock Plants and Cutting Rooting of Three Cultivars of Ornamental Perennials

IF 1 4区 农林科学 Q3 HORTICULTURE
Ronda D. Conner Koski, James E. Klett, Daniel Burcham
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引用次数: 0

Abstract

Many species of herbaceous perennials now have numerous cultivars, with growth habits and flower colors unique to each cultivar. Vegetative propagation is required so that resulting plants are genetically identical to the parent plant. Although many cultivars are selected for precocious and vigorous flowering, it is often difficult to collect adequate vegetative cuttings from such cultivars for commercial production because juvenile (vegetative) growth is preferred for high-quality cuttings. Cuttings that are reproductive (with flower buds or flowers) can have reduced or delayed rooting and increased occurrences of fungal pathogens (especially Botrytis species), resulting in lack of crop uniformity. We sought to answer the question, can growing stock plants of herbaceous perennials under defined photoperiods extend the length of the vegetative period and enhance the rooting of cuttings harvested from these stock plants? In this study, stock plants of ‘P009S’ twinspur (Diascia integerrima), ‘Furman's Red’ sage (Salvia greggii), and ‘Wild Thing’ sage (Salvia greggii) were grown under ambient, 12-hour light, 10-hour light, and 8-hour light to determine if a particular photoperiod could be used to suppress reproductive growth by promoting vegetative growth, thereby enhancing cutting rooting success. Effects of photoperiod treatments varied among the plant cultivars studied. Plants grown under 8-hour photoperiod had longer duration of vegetative growth, smaller growth rates, and lower dry weights when compared with plants grown under 12-hour or 10-hour photoperiod. Plants grown under 12-hour photoperiod had shorter duration of vegetative growth, larger growth rates, and higher dry weights when compared with plants grown under 10-hour and 8-hour photoperiods. The probability of rooting of cuttings harvested from stock plants of ‘P009S’ twinspur, ‘Furman’s Red’ sage, and ‘Wild Thing’ sage grown under 12-hour and 10-hour photoperiods was greater when compared with cuttings harvested from stock plants grown under 8 h photoperiod.
光周期处理对三个多年生观赏植物品种的栽培植株和扦插生根的影响
现在,许多种多年生草本植物都有许多栽培品种,每个栽培品种都有独特的生长习性和花色。栽培品种需要进行无性繁殖,这样培育出来的植株才能与亲本植株的基因完全相同。虽然许多栽培品种被选育为早熟和开花旺盛的品种,但通常很难从这些栽培品种中收集到足够的无性繁殖插条用于商业生产,因为优质插条更倾向于幼苗(无性)生长。有生殖能力(有花蕾或花)的插条可能会减少或延迟生根,增加真菌病原体(尤其是灰霉病菌)的发生,导致作物缺乏一致性。我们试图回答这样一个问题:在规定的光周期下种植多年生草本植物的原种植株,能否延长无性期的长度并提高从这些原种植株上收获的插条的生根率?在这项研究中,'P009S'双孢蘑菇(Diascia integerrima)、'Furman'红色鼠尾草(Salvia greggii)和'Wild Thing'鼠尾草(Salvia greggii)的原种植株分别在常温、12 小时光照、10 小时光照和 8 小时光照下生长,以确定是否可以通过促进无性生长来抑制生殖生长,从而提高扦插生根的成功率。光周期处理对不同栽培品种的影响各不相同。与 12 小时或 10 小时光周期下生长的植物相比,8 小时光周期下生长的植物无性生长持续时间更长、生长速度更慢、干重更低。与 10 小时和 8 小时光周期下的植株相比,12 小时光周期下的植株无性生长持续时间较短、生长速度较快、干重较高。从 12 小时和 10 小时光周期下生长的'P009S'双花鼠尾草、'Furman's Red'鼠尾草和'Wild Thing'鼠尾草原种植株上收获的插条与从 8 小时光周期下生长的原种植株上收获的插条相比,生根的几率更大。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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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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