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Rhizogenesis and concentration of carbohydrates in cuttings harvested at different phenological stages of once-blooming rose shrubs and treated with rooting stimulants
Biological Agriculture & Horticulture ( IF 1.5 ) Pub Date : 2019-11-07 , DOI: 10.1080/01448765.2019.1685407
Marta Joanna Monder 1 , Andrzej Pacholczak 2
Affiliation  

ABSTRACT The aim of this study was to evaluate the effect of rooting stimulators on the rooting of rose cuttings harvested at different phenological stages of the stock plants and on concentrations of carbohydrates in the shoots and leaves of the rooted cuttings. Shoots from once-blooming, difficult-to-root cultivars Duchesse d’Angoulême, Hurdals, Maiden’s Blush, Mousseuse Rouge were cut at the phenological stages: flower buds closed; all flowers open; immediately after petal shedding; and 7–14 days after petal fall. Single node stem cuttings were treated with rooting preparations containing either 0.4% IBA (Ukorzeniacz Aaqua) or 0.2% NAA (Ukorzeniacz Baqua) or with biostimulants Bio Rhizotonic, Root JuiceTM or Bio Roots. The phenological stage of the stock plant shoots had an important role in the propagation of the cultivars. Effects of IBA, NAA and the biostimulants depended on the phenological stage and the cultivar. Cuttings of all cultivars from shoots with closed flower buds had good rooting ability despite low concentrations of total soluble and reducing sugars in the plant tissue. In Hurdals and Maiden’s Blush, none of rooting stimulators improved the rooting percentage in cuttings from shoots collected at 7–14 days after petal fall, which had a low rooting ability. Concentrations of reducing and total carbohydrates in leaves and shoots of cuttings harvested at 7–14 days after petal fall were not correlated with the rooting parameters. The use of biostimulants can be recommended to stimulate rooting of these once-blooming roses instead of preparations containing IBA or NAA.

中文翻译:

曾经盛开的玫瑰灌木不同物候阶段收获并用生根刺激剂处理的插条中碳水化合物的根发生和浓度

摘要 本研究的目的是评估生根刺激剂对在不同物候阶段收获的玫瑰插条生根的影响,以及对生根插条枝条和叶子中碳水化合物浓度的影响。曾经盛开的、难以生根的品种 Duchesse d'Angoulême、Hurdals、Maiden's Blush、Mousseuse Rouge 的枝条在物候阶段被切割:花蕾闭合;百花齐放;花瓣脱落后立即;花瓣落下后7-14天。用含有 0.4% IBA (Ukorzeniacz Aaqua) 或 0.2% NAA (Ukorzeniacz Baqua) 的生根制剂或生物刺激剂 Bio Rhizotonic、Root JuiceTM 或 Bio Roots 处理单节茎插条。原种植物芽的物候阶段在品种繁殖中具有重要作用。IBA的影响,NAA 和生物刺激素取决于物候阶段和品种。尽管植物组织中的总可溶性糖和还原糖浓度较低,但从具有闭合花蕾的枝条上剪下的所有品种具有良好的生根能力。在 Hurdals 和 Maiden's Blush 中,没有一种生根刺激剂能提高在花瓣掉落后 7-14 天收集的枝条插条的生根百分比,这些枝条的生根能力较低。在花瓣落下后 7-14 天收获的插条的叶子和枝条中还原性和总碳水化合物的浓度与生根参数无关。可以推荐使用生物刺激剂来刺激这些曾经盛开的玫瑰的生根,而不是含有 IBA 或 NAA 的制剂。尽管植物组织中的总可溶性糖和还原糖浓度较低,但从具有闭合花蕾的枝条上剪下的所有品种具有良好的生根能力。在 Hurdals 和 Maiden's Blush 中,没有一种生根刺激剂能提高在花瓣掉落后 7-14 天收集的枝条插条的生根百分比,这些枝条的生根能力较低。在花瓣落下后 7-14 天收获的插条的叶子和枝条中还原性和总碳水化合物的浓度与生根参数无关。可以推荐使用生物刺激剂来刺激这些曾经盛开的玫瑰的生根,而不是含有 IBA 或 NAA 的制剂。尽管植物组织中的总可溶性糖和还原糖浓度较低,但从具有闭合花蕾的枝条上剪下的所有品种具有良好的生根能力。在 Hurdals 和 Maiden's Blush 中,没有一种生根刺激剂能提高在花瓣掉落后 7-14 天收集的枝条插条的生根百分比,这些枝条的生根能力较低。在花瓣落下后 7-14 天收获的插条的叶子和枝条中还原性和总碳水化合物的浓度与生根参数无关。可以推荐使用生物刺激剂来刺激这些曾经盛开的玫瑰的生根,而不是含有 IBA 或 NAA 的制剂。在花瓣落下后 7-14 天收集的枝条中,没有一种生根刺激剂能提高枝条的生根率,这些枝条的生根能力较低。在花瓣落下后 7-14 天收获的插条的叶子和枝条中还原性和总碳水化合物的浓度与生根参数无关。可以推荐使用生物刺激剂来刺激这些曾经盛开的玫瑰的生根,而不是含有 IBA 或 NAA 的制剂。在花瓣掉落后 7-14 天收集的枝条中,没有一种生根刺激剂能提高枝条的生根百分比,这些枝条的生根能力较低。在花瓣落下后 7-14 天收获的插枝的叶子和枝条中还原和总碳水化合物的浓度与生根参数无关。可以推荐使用生物刺激剂来刺激这些曾经盛开的玫瑰的生根,而不是含有 IBA 或 NAA 的制剂。
更新日期:2019-11-07
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