两种观赏灌木的耐旱性和恢复能力：将生理生化分析与叶片水分状态在线监测相结合，应用于城市环境。

IF 6.1 2区生物学 Q1 PLANT SCIENCES

Plant Physiology and Biochemistry Pub Date : 2024-10-18 DOI:10.1016/j.plaphy.2024.109208

Cassandra Detti , Antonella Gori , Lapo Azzini , Francesco Paolo Nicese , Francesca Alderotti , Ermes Lo Piccolo , Carlo Stella , Francesco Ferrini , Cecilia Brunetti

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引用次数: 0

摘要

当植物从苗圃转移到城市环境中时，往往会因养护不当（如灌溉不足）而面临干旱胁迫。使用耐旱物种可能有助于减轻干旱压力对城市环境的不利影响。此外，利用新技术监测水分状况有助于优化灌溉时间，防止移植失败。本研究调查了两种观赏灌木（Photinia x fraseri 和 Viburnum tinus）的生理和生化反应。在进行水分关系、气体交换、叶绿素荧光和生化分析的同时，还使用叶片水分计传感器（LWM）对水分状况进行了实时监测。水分胁迫对两种植物的叶片气体交换和水分关系都有明显的负面影响。值得注意的是，P. fraseri 通过降低叶绿素含量和 PSII 的实际效率避免了光抑制。叶片酚类化合物具有抗氧化和光保护特性，因此它们在提高两种植物的耐旱性方面发挥了重要作用。在重新浇水后，两种植物的生理功能都完全恢复，这表明它们对干旱胁迫具有显著的耐受性和恢复力。此外，LWM 传感器还能有效跟踪脱水水平，在水分胁迫过程中，两种植物的脱水水平呈上升趋势，而在重新浇水后，脱水水平随之下降。这些发现证实了 LWM 传感器在户外环境下监测植物生理状态的可靠性，使其成为适合在城市环境中使用的工具。

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Drought tolerance and recovery capacity of two ornamental shrubs: Combining physiological and biochemical analyses with online leaf water status monitoring for the application in urban settings

When plants are transferred from nursery to urban environments, they often face drought stress due to inadequate maintenance, such as insufficient irrigation. Using drought tolerant species may help mitigate the adverse impact of drought stress in urban settings. Additionally, utilizing novel technologies for water status monitoring may help optimize irrigation schedules to prevent transplanting failures. This study investigated the physiological and biochemical responses of two ornamental shrubs, Photinia x fraseri and Viburnum tinus, subjected to water stress of increasing severity and rewatering. Water relations, gas exchanges, chlorophyll fluorescence and biochemical analyses were conducted alongside real-time monitoring of water status using leaf-water-meter sensors (LWM).

The progression of water stress had a notable negative impact on leaf gas exchanges and water relations in both species. Notably, P. fraseri avoided photoinhibition by reducing chlorophyll content and actual efficiency of PSII. Adjustments in leaf phenolic compounds played a significant role in enhancing drought tolerance of both species due to their antioxidant and photoprotective properties.

Upon rewatering, both species exhibited complete recovery in their physiological functions, underscoring their remarkable tolerance and resilience to drought stress. Additionally, LWM sensors efficiently tracked the dehydration levels, exhibiting a rising trend during the water stress progression and a subsequent decline after rewatering for both species. These findings confirm the reliability of LWM sensors in monitoring physiological status of plants in outdoor contexts, making them a suitable tool for use in urban settings.

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来源期刊

Plant Physiology and Biochemistry 生物-植物科学

CiteScore

11.10

自引率

3.10%

发文量

410

审稿时长

33 days

期刊介绍： Plant Physiology and Biochemistry publishes original theoretical, experimental and technical contributions in the various fields of plant physiology (biochemistry, physiology, structure, genetics, plant-microbe interactions, etc.) at diverse levels of integration (molecular, subcellular, cellular, organ, whole plant, environmental). Opinions expressed in the journal are the sole responsibility of the authors and publication does not imply the editors'' agreement. Manuscripts describing molecular-genetic and/or gene expression data that are not integrated with biochemical analysis and/or actual measurements of plant physiological processes are not suitable for PPB. Also "Omics" studies (transcriptomics, proteomics, metabolomics, etc.) reporting descriptive analysis without an element of functional validation assays, will not be considered. Similarly, applied agronomic or phytochemical studies that generate no new, fundamental insights in plant physiological and/or biochemical processes are not suitable for publication in PPB. Plant Physiology and Biochemistry publishes several types of articles: Reviews, Papers and Short Papers. Articles for Reviews are either invited by the editor or proposed by the authors for the editor''s prior agreement. Reviews should not exceed 40 typewritten pages and Short Papers no more than approximately 8 typewritten pages. The fundamental character of Plant Physiology and Biochemistry remains that of a journal for original results.