删除或更新信息,请邮件至freekaoyan#163.com(#换成@)

汞胁迫对齿肋赤藓生物结皮细胞超微结构的影响

本站小编 Free考研考试/2021-12-30

闁诲孩顔栭崰鎺楀磻閹剧粯鈷戞い鎰剁悼閹藉瓥P闂備焦瀵х粙鎺楁儗椤斿墽鍗氶柛鎾楀懐鐓嬮悗骞垮劚閻楀啴宕戦幘璇茬妞ゅ繐妫楅悡娑㈡⒑閸忓吋绶查柛鐔稿▕閹焦寰勭仦鎯ф瀭闂佺硶鍓濇笟妤呭汲閵夆晜鈷掗柛娑卞幘缁狅絿绱掔仦鐣屽煟闁诡垰娲ㄩ埀顒婄到婢у海绮堟径瀣弿闁挎繂鎳愮粻鍙夌節閳ь剟鎮ч崼鈶╂灃閻庡箍鍎遍幊搴ㄦ偂閸屾埃妲堥柟缁㈠灠娴滈箖姊洪崨濠傜瑨婵☆偅绻堥獮鎰版晸閿燂拷
547闂備礁婀遍。浠嬪磻閹剧粯鈷掗柛鏇楁櫅閻忣亪鏌eΔ鈧柊锝夊箠閹捐绀冩い蹇撴閻撴盯姊洪崗鍏肩凡闁哥噥鍋勯悾鐑芥晸閿燂拷1130缂傚倷绀侀ˇ顖滅矓閻㈢鍋撻崹顐g殤闁逞屽墲椤鍠婂澶婃辈闁逞屽墴閺屸剝寰勭€n亜顫庡┑鐐茬墛閸ㄥ灝鐣烽敓鐘茬鐟滃繒绮欓崶鈺冪<濠㈣泛锕︽晥闂佸憡菧閸婃牜缂撻挊澹╂棃宕担瑙勭槣闂佸湱鍘ч悺銊╁箰閸洖鐒垫い鎴炲缁佺増銇勯銏╁剱闁挎稒鍔欓獮瀣敍濠婂拋妲锋繝鐢靛仦閸ㄥ綊寮粙妫电儤绻濋崶銊ユ闁哄鐗滈崑鎺楀吹閺冨牊鐓忛柛鈩冩礉閸忓瞼绱掗鍏夊亾鐡掍浇顫夐幆鏂库槈閹烘垳澹曟繛杈剧悼閺咁偄危閸儲鐓曢柟鐑樻尰閸嬬娀鏌嶈閸忔稓娆㈠璺洪棷濡わ絽鍟幊姘扁偓骞垮劚閸熺娀宕戦幘瀛樺闁绘垶锚閳ь剛鍋熼埀顒冾潐閹爼宕曢鐐茬劦妞ゆ垼鍎婚崗灞俱亜閹惧瓨鍊愰柟顔肩埣瀹曢亶骞囬妸銉ゅ婵炶揪绲炬禍鑺ョ閿曗偓闇夐柛蹇曞帶閹兼悂鏌嶈閸忔稑霉閸ヮ剙纾奸柕濠忕畱椤曡鲸鎱ㄥΟ绋垮姉闁稿鎸婚幏鍛喆閸曨剛鏆氶梻浣哄帶瀵儼銇愰崘顏嗙处濡わ絽鍟崑鐘绘煕閳╁啫濮€闁稿鎸婚幏鍛存偪椤栨艾绠戦梻浣告惈閸婄ǹ煤閵忋倕鐒垫い鎴炲缁佹澘顭跨憴鍕磳鐎殿喚鏁婚、娑樜熷畡棰佸婵炶揪缍€椤鎮¢埀顒勬⒒閸屾艾鈧粙顢欐繝鍕潟闁割偅娲栫粻缁樸亜閹炬潙顥氶柛瀣尰閹峰懘宕烽婧惧亾婵犲洦鍊垫繛鎴濈枃缁€瀣煃瑜滈崗娑氱矆娴h桨鐒婇柟娈垮枓閸嬫挸鈽夌€圭姷顦伴梺閫炲苯鍘告繛鏉戞喘椤㈡﹢宕妷褌绗夊┑掳鍊撻悞锔捐姳濮樿埖鐓忛柛鈩冩礈椤︼妇鈧湱枪椤嘲鐣烽敐鍥︽勃闁稿本顨呮禍鎯归敐鍛暈闁告洟绠栭弻锝夋倷閸欏妫戦梺閫炲苯鍘搁柣鎺炵畵瀵剟宕掑锝嗙參濠殿喚鎳撳ú鐘诲磻閹惧瓨濯撮柛娑橈攻閸f悂鏌f惔銏犲枙閻犳劗鍠栭崺鈧い鎴炲椤﹂绱撳鍜佸剶闁硅櫕鐗犻幊鐘活敆閸愮偓钑夌紓鍌欑劍閸愬骞忛敓锟�28缂傚倷绶¢崑澶愵敋瑜旈、妤呮偄閾忓湱鐓嬮梺瑙勬儗閸ㄥ磭绮堟繅娆糚濠电偞娼欓崥瀣嚌妤e啫绠熼柧蹇e亝婵挳骞栧ǎ顒€鈧洖鈻撻敓锟�128.00闂備胶枪缁绘劙宕板☉姘潟闁跨噦鎷�
刘卫国1,2,
霍举颂3,,,
黄廷温1,2,
玛丽亚·努尔兰1,2,
张雨1,2
1. 新疆大学资源与环境科学学院, 乌鲁木齐 830046;
2. 绿洲生态教育部重点实验室, 乌鲁木齐 830046;
3. 南京农业大学资源与环境科学学院, 南京 210095
作者简介: 刘卫国(1972-),男,副教授,研究方向为荒漠植物生态毒理学,E-mail:wgliuj@126.com.
通讯作者: 霍举颂,huo_jusong@163.com ;
基金项目: 国家自然科学基金项目(31260112);新疆联合基金项目(2017D01C058)


中图分类号: X171.5


Effect of Mercury on Ultrastructure of Mesophyll Cells of Syntrichia caninervis

Liu Weiguo1,2,
Huo Jusong3,,,
Huang Tingwen1,2,
Maliya Nuerlan1,2,
Zhang Yu1,2
1. College of Resource and Environment Sciences, Xinjiang University, Urumqi 830046, China;
2. Key Laboratory of Oasis Ecology, MOE, Urumqi 830046, China;
3. College of Resources and Environmental Sciences, Nanjing Agricultural University, Nanjing 210095, China
Corresponding author: Huo Jusong,huo_jusong@163.com ;

CLC number: X171.5

-->

摘要
HTML全文
(0)(0)
参考文献(0)
相关文章
施引文献
资源附件(0)
访问统计

摘要:细胞器结构是生物细胞功能的基础,而重金属会对细胞器结构产生毒害效应,进而破坏生物的组织器官完整性及生理代谢功能,汞对生物结皮细胞器超微结构的影响尚未见报道。为探究汞胁迫对齿肋赤藓生物结皮叶肉细胞超微结构的影响,将叶肉细胞暴露于不同浓度的汞溶液中(0、10、20、30、40、50和60 mmol·L-1),连续培养7 d,采用透射电镜技术观察叶肉细胞的变化。与对照组相比,汞浓度在20~60 mmol·L-1时,齿肋赤藓生物结皮的细胞器超微结构随汞浓度增加逐渐发生变化,细胞壁逐渐模糊,出现质壁分离现象,液泡出现一定的空泡化,叶绿体膜破损,类囊体、基粒及基质片层消失,细胞核解体及核仁消失。综上所述,齿肋赤藓生物结皮在低汞浓度时可维持有机体免受毒害,表明齿肋赤藓生物结皮有一定的重金属胁迫耐性,但超过阈值(20 mmol·L-1)时,出现汞胁迫伤害,且随汞浓度增加,胁迫毒害效应加剧。本研究结果可为干旱区非维管植物(齿肋赤藓)适应重金属胁迫环境理论及抗性物种培养提供参考。
关键词: 汞胁迫/
齿肋赤藓生物结皮/
生物土壤结皮/
超微结构

Abstract:Organelle structures are the basis of cell function, playing an essential role in the integrity of tissues and organs as well as the physiological and biochemical functions of the organism. Transmission electron microscopy was used to observe the toxic effects of mercury on the ultrastructure of mesophyll cells of Syntrichia caninervis. The results are as follows: (1) As the concentration of mercury reaching 20 mmol·L-1, the ultrastructure of the organelles of Syntrichia caninervis changed slightly, regarded as the critical concentration of the stress; (2) When the concentration of mercury was between 30~40 mmol·L-1, the color of the cell wall deepened, and its structure blurred partially, showing signs of plasmolysis; vacuoles appeared to be vacuolated; chloroplast was obviously swollen, and its membrane was wrinkled and deformed; while the basal granules and the matrix lamella were blurred, the nucleus was blurred severely; (3) While the concentration of mercury arrived at 50~60 mmol·L-1, the cell wall plasmolyed significantly; chloroplast swelled severly, with its membrane destructed; its thylakoids, basal granules and matrix sheets disappeared completely; nucleus disintegrated and nucleoli vanished. It is indicated that Syntrichia caninervis can protect the organism from damage at low concentrations of mercury (less than 20 mmol·L-1), suggesting that Syntrichia caninervis has the ability to resist metal stress to some degree. However, if the concentration of mercury exceeds the threshold of 20 mmol·L-1, mercury stress damage will occur, and with the increase of mercury concentration, the stress poisoning effect is intensified.
Key words:Syntrichia caninervis/
mercury stress/
biological soil crusts/
ultrastructure.

加载中

相关话题/生物 结构 细胞 培养 资源与环境科学学院