A CHEMICAL BASIS FOR DIFFERENTIAL ALLELOPATHIC POTENTIAL OF SORGHUM HYBRIDS ON WHEAT
A CHEMICAL BASIS FOR DIFFERENTIAL ALLELOPATHIC POTENTIAL OF SORGHUM HYBRIDS ON WHEAT
复制标题
DOI：
10.1007/bf02033460
复制
发表时间：
1995-06-01
影响因子：
2.3
通讯作者：
SARWAR, M
中科院分区：
文献类型：
--
作者：
BENHAMMOUDA, M;KREMER, RJ;SARWAR, M
通过对其酚类含量进行定量和定性研究，研究了高粱（Sorghum bicolor L. Moench）杂交种之间差异化感潜力的基础。高粱植物部分的总酚含量在杂交品种内、杂交品种之间以及生长季节之间存在差异。小麦 (Triticum aestivum L.) 胚根生长的抑制与植物部分中所含的总酚浓度呈正相关 (r = 0.66)。高粱植物中茎提取物的毒性比例最高，抑制胚根生长高达 74.7%。三个高粱杂交种的所有植物部分中五种酚酸：对羟基苯甲酸 (POH)、香草酸 (VAN)、丁香酸 (SYR)、对香豆酸 (PCO) 和阿魏酸 (FER) 的浓度都不同。 POH、VAN 和 SYR 的浓度始终高于 PCO 和 FER。 PCO 和 FER 在某些植物部分中不存在，其中 FER 是最常缺失的。发现对小麦胚根生长的抑制与每种酚酸的浓度呈正相关。香草酸与抑制作用的相关性最高（r = 0.44）。因此，地上高粱组织含有有助于化肥潜力的酚酸。此外，高粱根部分泌的 POH、VAN 和 SYR 可能会增强高粱在生长期间和收获后（当残留物保留在土壤表面上或在种植后续作物之前掺入）时的整体化感潜力。
The basis for differential allelopathic potentials among sorghum (Sorghum bicolor L. Moench) hybrids was investigated by conducting quantitative and qualitative studies of their phenolic contents. Total phenolic content in sorghum plant parts varied within hybrids, among hybrids, and between growing seasons. Inhibition of wheat (Triticum aestivum L.) radicle growth was positively associated (r = 0.66) with concentrations of total phenolics contained in plant parts. Extracts from culms contributed the highest proportion of toxicity from sorghum plants, inhibiting radicle growth up to 74.7$%. Concentrations of five phenolic acids, p-hydroxybenzoic (POH), vanillic (VAN), syringic (SYR), p-coumaric (PCO), and ferulic (FER), differed in all plant parts of the three sorghum hybrids. Concentrations of POH, VAN, and SYR were consistently higher than PCO and FER. PCO and FER were absent from some plant parts, with FER being the most frequently missing. Inhibition of wheat radicle growth was found to be positively associated with the concentration of each phenolic acid. Vanillic acid was most highly associated (r = 0.44) with inhibition. Thus, above-ground sorghum tissues contained phenolic acids that contributed to allelopatic potential. Additionally, sorghum roots exuded POH, VAN, and SYR that may enhance the overall allelopathic potential of sorghum during growth and after harvest when residues remain on the soil surface or are incorporated prior to planting a subsequent crop.