Measurement of foliar H(2)O(2) concentration can be an indicator of riparian vegetation management.
Measurement of foliar H(2)O(2) concentration can be an indicator of riparian vegetation management.
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DOI：
10.1038/s41598-022-17658-2
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发表时间：
2022-08-13
影响因子：
4.6
通讯作者：
Rashid, Md Harun
中科院分区：
文献类型：
--
作者：
Asaeda, Takashi;Rahman, Mizanur;Vamsi-Krishna, Lekkala;Schoelynck, Jonas;Rashid, Md Harun
河岸植被经常受到非生物胁迫，河流水文条件的巨大差异会产生活性氧（ROS）。在不同的活性氧中，过氧化氢（H2 O2）相对稳定，可以适当地测量。因此，植物H2 O2的定量化可以作为河岸植被管理的胁迫指标。目前的研究探讨植物的空间分布河岸植被群落的河岸带通过量化的环境压力，利用叶面过氧化氢浓度的海拔梯度。柳树属，本研究以刺槐、臭椿、核桃楸、芦苇、日本芦苇、芒为试验材料。采集叶片组织测定H2 O2浓度，同时采集河岸土壤样品测定土壤总氮、总磷和含水量。随着土壤含水量的增加，乔木H2 O2浓度增加，柳属和草本植物H2 O2浓度呈负相关，H_2O_2浓度随土壤含水量的增加而降低。在这项研究中，我们发现了一个独特的显着的相互作用，土壤水分含量和H2 O2浓度，无论是正相关或负相关的关系，当与其他参数相比，如TN或TP浓度或TN：TP在河岸土壤。种特异性分布区可以解释的H2 O2浓度在植物砾石和桑迪渠道的土壤水分的理论范围。每个物种的H2 O2浓度通过推导的方程估计，并直接关系到海拔以上的通道。与实地观察到的植物海拔分布的比较表明，所有物种的空间分布，作为物种特异性海拔H2 O2浓度保持在40 μmol/gFW以下。因此，本研究表明，叶H2 O2浓度可以是一个有用的基准河岸植被的分布潜力。
Riparian vegetation is frequently exposed to abiotic stress, which generates reactive oxygen species (ROS) caused by strong differences in a river’s hydrological conditions. Among different ROS, hydrogen peroxide (H2O2) is relatively steady and can be measured appropriately. Thus, the quantification of plant H2O2 can be used as a stress indicator for riparian vegetation management. The current study examines the spatial distribution of plants by riparian vegetation communities across the elevation gradient of riparian zones through quantification of environmental stress using foliar H2O2 concentration. The trees Salix spp., Robinia pseudoacacia, Ailanthus altissima with Juglans mandshurica, and the herbs Phragmites australis, Phragmites japonica, and Miscanthus sacchariflorus were selected for this study. Leaf tissues were collected to analyze H2O2 concentration, meanwhile riparian soil was sampled to measure total nitrogen (TN), total phosphorus (TP), and moisture content. The H2O2 concentration of tree species increased with higher soil moisture content, which was negatively correlated for Salix and herb spp., in which H2O2 concentration always decreased with high soil moisture. In this study, we found a unique significant interaction between soil moisture content and H2O2 concentration, both positively or negatively correlated relationships, when compared with other parameters, such as TN or TP concentrations or TN: TP in riparian soil. The species-specific distribution zones can be explained by the H2O2 concentration in the plant for gravelly and sandy channels on a theoretical range of soil moisture. Each species’ H2O2 concentration was estimated through derived equations and is directly related to an elevation above the channel. The comparison with the observed distribution of plant elevations in the field indicated that all species showed a spatial distribution that acts as species-specific elevations where H2O2 concentrations stayed below 40 μmol/gFW. Hence, the present study suggests that foliar H2O2 concentration can be a useful benchmark for the distribution potentiality of riparian vegetation.
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