外源施用腐植酸通过调节渗透酶和养分平衡减轻油松的盐胁迫

IF 2.4 3区 农林科学 Q1 AGRONOMY Gesunde Pflanzen Pub Date : 2023-10-20 DOI:10.1007/s10343-023-00939-9
Fawzy F. Lasheen, Mohammed Hewidy, Ahmed N. Abdelhamid, Ramez S. Thabet, Mohamed M. M. Abass, Asmaa A. Fahmy, Hani S. Saudy, Karim M. Hassan
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引用次数: 1

摘要

摘要改善植物细胞中渗透物质和营养平衡的生理状态是改善盐碱危害的关键。在这种情况下,腐殖质物质在刺激植物对各种胁迫的耐受性方面具有重要作用。因此,本研究旨在评估叶面喷施腐植酸(0和150 mg L−1)对避免盐胁迫(0、4000和8000 mg L−1)对pittosporum植物营养生长、蛋白质、脯氨酸、过氧化物酶活性和与盐有关的营养成分的影响的重要性。处理采用随机完全区组设计,每组3个重复。结果表明,添加mg L−1腐植酸时,植株的营养生长最高。而4000和8000 mg L−1的盐度水平导致蛋白质、脯氨酸过氧化物酶活性、氯离子和钠离子的增加。与未施用腐植酸的植株相比,在4000mg L−1盐度水平下施用腐植酸,第二季株高、根鲜重株−1、根干重株−1、茎鲜重株−1和茎干重株−1分别提高了12.6%、10.9%、17.7%、43.4和19.4%。不同盐度下施用腐植酸对两个季节的保叶效果均较好,落叶数均有所减少。在4000 mg L−1和8000 mg L−1处理下,钾含量分别增加12.0%和22.4%。蛋白质、脯氨酸含量和过氧化物酶活性在腐植酸×盐浓度为4000 mg L−1时达到最小值。综上所述,施用腐殖质可减轻盐的有害影响,改善皮孢属植物的营养生长参数和生理状况,同时增加有益养分的吸收。
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Exogenous Application of Humic Acid Mitigates Salinity Stress on Pittosporum (Pittosporum tobira) Plant by Adjusting the Osmolytes and Nutrient Homeostasis
Abstract Improving the physiological status expressed in adjusting the osmolytes and nutrients balance of plant cell is a crucial matter for ameliorating the hazards of salinity. In this context, humic substances have a significant role for stimulating the plant tolerance to various stresses. Therefore, the current study aimed to assess the importance of foliar spray of humic acid (0 and 150 mg L −1 ) for avoiding the effect of salt stress (0, 4000 and 8000 mg L −1 ) on vegetative growth of pittosporum plant, protein, proline, peroxidase activity and nutrient components related to salinity. The treatments were arranged in a randomized complete block design with 3 replicates. Results revealed that the highest vegetative growth was recorded with mg L −1 humic acid. While, salinity levels of 4000, and 8000 mg L −1 led to increases in protein, proline peroxidase activity, and chloride and sodium inions. Compared to humic acid-untreated plants, application of humic acid under salinity level of 4000 mg L −1 enhanced plant height, root fresh weight plant −1 , root dry weight plant −1 , shoot fresh weight plant −1 and shoot dry weight plant −1 by 12.6, 10.9, 17.7, 43.4, 19.4%, respectively, in the second season. Humic acid application under all salinity levels showed favorable effect for keeping leaves in both seasons, since fallen leaves number was reduced. The increases in potassium (K) content reached about 12.0 and 22.4% under 4000 mg L −1 and 8000 mg L −1 , respectively, owing to humic acid application. Protein, proline content and peroxidase activity showed the minimal values under humic acid × salinity level of 4000 mg L −1 . It could be concluded that application of humic mitigates the harmful effect of salinity and improves the vegetative growth parameters and physiological status of pittosporum plants while increases the uptake of beneficial nutrients.
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来源期刊
Gesunde Pflanzen
Gesunde Pflanzen 农林科学-农艺学
CiteScore
3.50
自引率
25.80%
发文量
152
审稿时长
>12 weeks
期刊介绍: Gesunde Pflanzen publiziert praxisbezogene Beiträge zum Pflanzenschutz in Landwirtschaft, Forstwirtschaft, Gartenbau und öffentlichem Grün und seinen Bezügen zum Umwelt- und Verbraucherschutz sowie zu Rechtsfragen. Das Themenspektrum reicht von der Bestimmung der Schadorganismen über Maßnahmen und Verfahren zur Minderung des Befallsrisikos bis hin zur Entwicklung und Anwendung nicht-chemischer und chemischer Bekämpfungsstrategien und -verfahren, aber auch zu Fragen der Auswirkungen des Pflanzenschutzes auf die Umwelt, die Sicherung der Ernährung sowie zu allgemeinen Fragen wie Nutzen und Risiken und zur Entwicklung neuer Technologien. Jedes Heft enthält Originalbeiträge renommierter Wissenschaftler, aktuelle Informationen von Verbänden sowie aus der Industrie, Pressemitteilungen und Personalia. Damit bietet die Zeitschrift vor allem Behörden und Anwendern im Agrarsektor und Verbraucherschutz fundierte Praxisunterstützung auf wissenschaftlichem Niveau.
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