Pub Date : 2024-03-26DOI: 10.1134/s1062359023604640
Li Huang, Duanheng Wang, Ailing Zhou, Mingming Qian, Chong Zhou
Abstract
In this study, we aimed to explore the effect and underlying mechanism of aging in female ovarian function in mice. The mice at the age of 10 months and 7 weeks were used as the aged model and the young control. The estrus cycle and serum peripheral blood and the number of follicles, oocytes and litter size were also calculated for analysis of ovarian function. Ovarian cells were collected for reactive oxygen species (ROS) and Annexin V staining. Antioxidant and apoptotic proteins BAX and Caspase-3 and phosphoinositol-3-kinase (PI3K)/protein kinase B (Akt)/mammalian target of rapamycin (mTOR) pathway in ovaries were also detected. The results showed that compared to the young control, the aged mice exhibited ovarian dysfunction with disrupted estrus cycle and hormone production, accompanied by decreases in the numbers of follicles, oocytes and litter size. The oxidative damage in aged ovarian tissues was induced with increased Malondialdehyde content and reduced activities of Catalase and Superoxide Dismutase enzymes, as well as high level of ROS accumulation and apoptosis in ovarian cells. Furthermore, the expression levels of BAX, Caspase-3 and PI3K, Akt, mTOR and their phosphorylated forms were obviously regulated in the aged ovaries. Thus, these results above suggest oxidative damage with high level of ROS is obviously induced in ovarian tissues of aged mice, and this accumulation mediates apoptosis of ovarian cells, involving with improved expression of apoptotic protein BAX and Caspase-3, ultimately leads to ovarian dysfunction through the PI3K/Akt/mTOR pathway.
{"title":"Regulation of Ovary Function in Aged Mice by Reactive Oygen Species through the PI3K/Akt/mTOR Pathway","authors":"Li Huang, Duanheng Wang, Ailing Zhou, Mingming Qian, Chong Zhou","doi":"10.1134/s1062359023604640","DOIUrl":"https://doi.org/10.1134/s1062359023604640","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In this study, we aimed to explore the effect and underlying mechanism of aging in female ovarian function in mice. The mice at the age of 10 months and 7 weeks were used as the aged model and the young control. The estrus cycle and serum peripheral blood and the number of follicles, oocytes and litter size were also calculated for analysis of ovarian function. Ovarian cells were collected for reactive oxygen species (ROS) and Annexin V staining. Antioxidant and apoptotic proteins BAX and Caspase-3 and phosphoinositol-3-kinase (PI3K)/protein kinase B (Akt)/mammalian target of rapamycin (mTOR) pathway in ovaries were also detected. The results showed that compared to the young control, the aged mice exhibited ovarian dysfunction with disrupted estrus cycle and hormone production, accompanied by decreases in the numbers of follicles, oocytes and litter size. The oxidative damage in aged ovarian tissues was induced with increased Malondialdehyde content and reduced activities of Catalase and Superoxide Dismutase enzymes, as well as high level of ROS accumulation and apoptosis in ovarian cells. Furthermore, the expression levels of BAX, Caspase-3 and PI3K, Akt, mTOR and their phosphorylated forms were obviously regulated in the aged ovaries. Thus, these results above suggest oxidative damage with high level of ROS is obviously induced in ovarian tissues of aged mice, and this accumulation mediates apoptosis of ovarian cells, involving with improved expression of apoptotic protein BAX and Caspase-3, ultimately leads to ovarian dysfunction through the PI3K/Akt/mTOR pathway.</p>","PeriodicalId":55366,"journal":{"name":"Biology Bulletin","volume":"187 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140313653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-26DOI: 10.1134/s1062359023605694
Raha Tabrizi Dooz, Davood Naderi, Sepideh Kalatehjari, Hossein Ali Asadi Gharneh, Marzieh Ghanbari Jahromi
Abstract
High soil salinity, a result of salt stress, poses a significant obstacle to crop cultivation, particularly for ornamental plants like narcissus. Plant growth regulators, such as methyl jasmonate (MeJA), have the potential to mitigate the impact of stressful conditions. This study involved different MeJA concentrations (0, 50, 100, and 200 µM) and varying levels of salt stress (4 and 8 dS m–1), along with a control level, in a pot experiment conducted using a complete randomized block design with three replicates at the Research Greenhouse, Islamic Azad University, Isfahan (Khorasgan) Branch. The research revealed that salt stress led to a substantial increase in leaf proline and flavonoid levels, as well as electrolyte leakage (EL), hydrogen peroxide (H2O2), malondialdehyde (MDA), catalase (CAT), and superoxide dismutase (SOD) enzymatic activities. These increases were more pronounced when MeJA was applied concurrently with a decrease in EL, H2O2, and MDA. Conversely, salt stress was observed to reduce chlorophyll and carotenoid levels, relative water content (RWC), flower fresh weight, flower longevity on the plant, and flowering duration. This underscores MeJA’s potential as a growth regulator that safeguards narcissus against salinity toxicity. The findings indicate that 100 µM MeJA activates an effective mechanism to mitigate the adverse effects of salinity.
摘要 高土壤盐度是盐胁迫的结果,对作物栽培,尤其是水仙等观赏植物的栽培构成了重大障碍。植物生长调节剂,如茉莉酸甲酯(MeJA),具有减轻胁迫条件影响的潜力。这项研究在伊斯法罕(霍拉斯甘)伊斯兰阿扎德大学分校研究温室进行了一项盆栽实验,采用完全随机区组设计,三次重复,实验涉及不同浓度的 MeJA(0、50、100 和 200 µM)和不同程度的盐胁迫(4 和 8 dS m-1)以及对照水平。研究发现,盐胁迫导致叶片脯氨酸和类黄酮水平以及电解质渗漏(EL)、过氧化氢(H2O2)、丙二醛(MDA)、过氧化氢酶(CAT)和超氧化物歧化酶(SOD)酶活性大幅增加。在施用 MeJA 的同时,EL、H2O2 和 MDA 的含量降低,这些增加更为明显。相反,观察到盐胁迫降低了叶绿素和类胡萝卜素水平、相对含水量(RWC)、花鲜重、花在植株上的寿命以及花期。这凸显了 MeJA 作为一种生长调节剂的潜力,它能保护水仙免受盐度毒性的影响。研究结果表明,100 µM MeJA 能激活一种有效机制,减轻盐度的不利影响。
{"title":"Methyl Jasmonate’s Role in Alleviating Salt Stress-Induced Challenges in Narcissus Growth","authors":"Raha Tabrizi Dooz, Davood Naderi, Sepideh Kalatehjari, Hossein Ali Asadi Gharneh, Marzieh Ghanbari Jahromi","doi":"10.1134/s1062359023605694","DOIUrl":"https://doi.org/10.1134/s1062359023605694","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>High soil salinity, a result of salt stress, poses a significant obstacle to crop cultivation, particularly for ornamental plants like narcissus. Plant growth regulators, such as methyl jasmonate (MeJA), have the potential to mitigate the impact of stressful conditions. This study involved different MeJA concentrations (0, 50, 100, and 200 µM) and varying levels of salt stress (4 and 8 dS m<sup>–1</sup>), along with a control level, in a pot experiment conducted using a complete randomized block design with three replicates at the Research Greenhouse, Islamic Azad University, Isfahan (Khorasgan) Branch. The research revealed that salt stress led to a substantial increase in leaf proline and flavonoid levels, as well as electrolyte leakage (EL), hydrogen peroxide (H<sub>2</sub>O<sub>2</sub>), malondialdehyde (MDA), catalase (CAT), and superoxide dismutase (SOD) enzymatic activities. These increases were more pronounced when MeJA was applied concurrently with a decrease in EL, H<sub>2</sub>O<sub>2</sub>, and MDA. Conversely, salt stress was observed to reduce chlorophyll and carotenoid levels, relative water content (RWC), flower fresh weight, flower longevity on the plant, and flowering duration. This underscores MeJA’s potential as a growth regulator that safeguards narcissus against salinity toxicity. The findings indicate that 100 µM MeJA activates an effective mechanism to mitigate the adverse effects of salinity.</p>","PeriodicalId":55366,"journal":{"name":"Biology Bulletin","volume":"80 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140313646","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-26DOI: 10.1134/s1062359023605554
Abstract
Aquatic flora of Dagestan, the diverse region connecting the Caucasian and Aralo-Caspian floristic provinces, received little research effort. Therefore, we conducted two expeditions across aquatic and wetland habitats of Dagestan in June and September 2021 and analyzed public records of aquatic plants from the GBIF database. We report new data on distribution of 35 aquatic vascular plants taxa in Dagestan. A hybrid between Ranunculus peltatus and R. trichophyllus was firstly reported in Russia, although no occurrences of R. peltatus are known in the country. Najas major and hybrid Potamogeton × salicifolius (P. lucens × P. perfoliatus) are new to the Caucasus, and five more species are new to Dagestan (Myriophyllum sibiricum, Najas graminea, Potamogeton pusillus, Typha domingensis, Utricularia minor).
{"title":"New Data on Aquatic Flora of Dagestan","authors":"","doi":"10.1134/s1062359023605554","DOIUrl":"https://doi.org/10.1134/s1062359023605554","url":null,"abstract":"<span> <h3>Abstract</h3> <p>Aquatic flora of Dagestan, the diverse region connecting the Caucasian and Aralo-Caspian floristic provinces, received little research effort. Therefore, we conducted two expeditions across aquatic and wetland habitats of Dagestan in June and September 2021 and analyzed public records of aquatic plants from the GBIF database. We report new data on distribution of 35 aquatic vascular plants taxa in Dagestan. A hybrid between <em>Ranunculus peltatus</em> and <em>R. trichophyllus</em> was firstly reported in Russia, although no occurrences of <em>R. peltatus</em> are known in the country. <em>Najas major</em> and hybrid <em>Potamogeton</em> × <em>salicifolius</em> (<em>P. lucens</em> × <em>P. perfoliatus</em>) are new to the Caucasus, and five more species are new to Dagestan (<em>Myriophyllum sibiricum</em>, <em>Najas graminea</em>, <em>Potamogeton pusillus</em>, <em>Typha domingensis</em>, <em>Utricularia minor</em>).</p> </span>","PeriodicalId":55366,"journal":{"name":"Biology Bulletin","volume":"55 1","pages":""},"PeriodicalIF":0.5,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140313667","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}