厦门大学学报（自然科学版）
廈門大學學報（自然科學版）
하문대학학보（자연과학판）
JOURNAL OF XIAMEN UNIVERSITY (NATURAL SCIENCE)
2009年
6期
910-914
,共5页
红树植物%秋茄%多环芳烃%芘%生理生态效应
紅樹植物%鞦茄%多環芳烴%芘%生理生態效應
홍수식물%추가%다배방경%비%생리생태효응
mangrove%Kandelia candel%polycyclic aromatic hydrocarbons%pyrene%ecophysiological responses
采用砂基栽培,研究不同浓度(0,0.1,1,10 mg/ L)多环芳烃芘(Pyr),对红树植物秋茄(Kandelia candel)幼苗光合色素含量、光合速率、可溶性糖和可溶性蛋白含量以及水分代谢的影响.结果表明: Pyr在0.1 mg/L及以下浓度,对秋茄幼苗叶片Chla、Chlb、叶绿素总量以及叶片的净光合速率的影响不明显;而浓度达1 mg/L及以上水平,则幼苗叶片Chla、Chlb和叶绿素总量均随之提高,Chla与Chlb比值未发生明显变化,而净光合速率则随之降低;Pyr浓度达1 mg/L及以上水平,对幼苗叶片的可溶性糖和可溶性蛋白含量,具有明显的促进作用.随着Pyr浓度的提高,幼苗原胚轴组织水势逐渐降低.Pyr浓度为0.1 mg/L,叶片气孔导度和蒸腾速率较对照组有明显提高,表现了PAHs的正刺激作用;浓度为1～10 mg/L,叶片气孔导度和蒸腾速率均显著降低.秋茄幼苗对环境Pyr胁迫的抗性适宜生长的浓度范围在0.1～1 mg/L之间.
採用砂基栽培,研究不同濃度(0,0.1,1,10 mg/ L)多環芳烴芘(Pyr),對紅樹植物鞦茄(Kandelia candel)幼苗光閤色素含量、光閤速率、可溶性糖和可溶性蛋白含量以及水分代謝的影響.結果錶明: Pyr在0.1 mg/L及以下濃度,對鞦茄幼苗葉片Chla、Chlb、葉綠素總量以及葉片的淨光閤速率的影響不明顯;而濃度達1 mg/L及以上水平,則幼苗葉片Chla、Chlb和葉綠素總量均隨之提高,Chla與Chlb比值未髮生明顯變化,而淨光閤速率則隨之降低;Pyr濃度達1 mg/L及以上水平,對幼苗葉片的可溶性糖和可溶性蛋白含量,具有明顯的促進作用.隨著Pyr濃度的提高,幼苗原胚軸組織水勢逐漸降低.Pyr濃度為0.1 mg/L,葉片氣孔導度和蒸騰速率較對照組有明顯提高,錶現瞭PAHs的正刺激作用;濃度為1～10 mg/L,葉片氣孔導度和蒸騰速率均顯著降低.鞦茄幼苗對環境Pyr脅迫的抗性適宜生長的濃度範圍在0.1～1 mg/L之間.
채용사기재배,연구불동농도(0,0.1,1,10 mg/ L)다배방경비(Pyr),대홍수식물추가(Kandelia candel)유묘광합색소함량、광합속솔、가용성당화가용성단백함량이급수분대사적영향.결과표명: Pyr재0.1 mg/L급이하농도,대추가유묘협편Chla、Chlb、협록소총량이급협편적정광합속솔적영향불명현;이농도체1 mg/L급이상수평,칙유묘협편Chla、Chlb화협록소총량균수지제고,Chla여Chlb비치미발생명현변화,이정광합속솔칙수지강저;Pyr농도체1 mg/L급이상수평,대유묘협편적가용성당화가용성단백함량,구유명현적촉진작용.수착Pyr농도적제고,유묘원배축조직수세축점강저.Pyr농도위0.1 mg/L,협편기공도도화증등속솔교대조조유명현제고,표현료PAHs적정자격작용;농도위1～10 mg/L,협편기공도도화증등속솔균현저강저.추가유묘대배경Pyr협박적항성괄의생장적농도범위재0.1～1 mg/L지간.
In this paper,the effects of increased concentrations of pyrene(0,0.1,1 and 10 mg/L) on the photosynthetic pigments,net photosynthetic rate,soluble sugar,soluble protein content,and water metabolism of mangrove Kandelia candel(L.) Druce seedlings were studied in sand culture.The results showed: the photosynthetic pigments and net photosynthetic rate of leaves showed no significant difference at concentration of 0.1mg/L pyrene.With increasing pyrene level,the photosynthetic pigments significantly increased at concentration of 1 mg/L pyrene and above,while the net photosynthetic rate significantly decreased.The ratio of chlorophyll a to chlorophyll b had no significant difference.Increasing pyrene concentrations (1 mg/L and above) induced an increase in the soluble sugar and soluble protein content of leaves.With increasing pyrene level,the water potential in hypocotyls decreased.The transpiration rate and stomatal conductance of seedlings at 1 mg/L were significantly higher than that of the control seedlings,whereas significantly decreased when at 1 and 10 mg/L pyrene.The tolerance range of pyrene in mangrove Kandelia candel(L.) Druce seedlings may be 0.1～1 mg/L.
