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PHYSIOLOGICAL AND BIOCHEMICAL RESPONSES OF WHEAT (TRITICUM AESTIVUM L.) PLANTS TO POLYAMINES UNDER LEAD STRESS 小麦(triticum aestivum l .)生理生化反应铅胁迫下植物对多胺的反应

Innovare Journal of Agricultural Sciences Pub Date : 2021-02-19 DOI: 10.22159/IJAGS.2021.V9I1.40687

M. Rady, M. El-Yazal, Hanan A. A. Taie, Safia Ahmed

{"title":"PHYSIOLOGICAL AND BIOCHEMICAL RESPONSES OF WHEAT (TRITICUM AESTIVUM L.) PLANTS TO POLYAMINES UNDER LEAD STRESS","authors":"M. Rady, M. El-Yazal, Hanan A. A. Taie, Safia Ahmed","doi":"10.22159/IJAGS.2021.V9I1.40687","DOIUrl":"https://doi.org/10.22159/IJAGS.2021.V9I1.40687","url":null,"abstract":"Objective: The distribution, growth, development and productivity of wheat plants are greatly affected by various abiotic stresses such as lead (Pb) stress which become one of the most abundant toxic metal in the earth crust. Under the three applied polyamine (PAs) applications, the efficiency of wheat plants to tolerate Pb2+ stress in terms of growth and yield characteristics was noticed to varying degrees. \u0000Methods: The current study focused on the impact of 2.0 mM lead (Pb2+) on growth and performance of wheat plants before and after PAs applications. The sterilized seeds were soaked for 8 h at room temperature, either in distilled water (as a control), 0.25 mM spermine (Spm), 0.50 mM spermidine (Spd), or in 1.0 mM putrescine (Put). \u0000Results: Point out that, better growth and yield characteristics, chlorophyll “a” (Chl-a), chlorophyll “b” (Chl-b), soluble sugars, indoles, and enzymatic antioxidants (i.e., peroxidase (POX), catalase, ascorbate peroxidase, ascorbate oxidase, polyphenol oxidase, and glutathione reductase) and the enzyme α-amylase contents were obtained with seed soaking in 0.25 mM Spm, 0.50 mM Spd, or 1.0 mM Put than those generated with seed soaking in water under 2.0 mM Pb2+ stress. In contrast, the concentration of endogenous Pb2+ was significantly reduced. \u0000Conclusion: Among all tested PAs, 1.0 mM Put showed the best results and thus is recommended, as seed soaking, for wheat to grow well under Pb2+ stress.","PeriodicalId":235329,"journal":{"name":"Innovare Journal of Agricultural Sciences","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115238217","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

THE CONTROL OF APRICOT SEED DORMANCY AND GERMINATION BY LOW TEMPERATURE TREATMENTS 低温处理对杏种子休眠和萌发的控制

Innovare Journal of Agricultural Sciences Pub Date : 2021-02-19 DOI: 10.22159/IJAGS.2021.V9I1.40689

S. A. S. El-Yazal, Mohamed A Ei-Yazal

{"title":"THE CONTROL OF APRICOT SEED DORMANCY AND GERMINATION BY LOW TEMPERATURE TREATMENTS","authors":"S. A. S. El-Yazal, Mohamed A Ei-Yazal","doi":"10.22159/IJAGS.2021.V9I1.40689","DOIUrl":"https://doi.org/10.22159/IJAGS.2021.V9I1.40689","url":null,"abstract":"Objective: Freshly harvested seeds of “Local” apricot variety were found to be dormant and did not germinate at all. A specific low-temperature stratification treatment was required to overcome seed dormancy. The most effective temperature for breaking seed dormancy, germination, and seedling growth was 5°C cold stratification (CS). Increased seed germination percentage was recorded when the period of stratification prolonged. Seedling developed from stratified seeds had better growth than those developed from non-stratified seeds. \u0000Methods: For stratification treatments, the seeds with removed endocarp were mixed with moistened sand. Afterward, they were subjected to a period of stratification at 5°C. Seeds were stratified in pots of 30 cm×40 cm. Stratified seeds were regularly irrigated once per week. To prevent the water loss during stratification upper surface of pots was covered by a sack. The following stratification was applied for apricot variety: CS for 0, 3, 6, 9, 12, and15 days in 1998 and 1999 years for “Local” variety. \u0000Results: Apricot seeds required a CS of about 15 days for “Local” variety to reach maximum germination and normal seedling growth. Moreover, when stratification period was prolonged, some of the chemical constituents of apricot seeds were increased and other was decreased. Therefore, it can be suggested that breaking of dormancy is coincided with several changes in different chemical constituents of seeds. Some of these materials increased (total, reducing and non-reducing sugars, total free amino acids, total indoles, and total and conjugated phenols) and other materials such as free phenols which decreased at seed germinations. \u0000Conclusion: The most effective temperature for breaking seed dormancy, germination, and seedling growth was 5°C CS. Increased seed germination percentage was recorded when the period of stratification prolonged. Seedling developed from stratified seeds had better growth than those developed from non-stratified seeds.","PeriodicalId":235329,"journal":{"name":"Innovare Journal of Agricultural Sciences","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-02-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122274862","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

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