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1、云南龍膽種子萌發(fā)特性研究摘要：?文以云南龍膽（Gentianayunnanensis）種子為試驗材料，經(jīng)赤霉素、氯化鈣、硝酸鉀的不同濃度處理，用不同溫度浸種，置不同光照下培養(yǎng)，研宄其萌發(fā)特性。結果表明：云南龍膽種子經(jīng)室溫培養(yǎng)10d即可萌發(fā)；在不同浸種溫度下萌發(fā)率相差不顯著。蒸餾水室溫浸種，24h/d光照培養(yǎng)萌發(fā)率為50%，自然光照培養(yǎng)萌發(fā)率為60%，黑暗條件培養(yǎng)萌發(fā)率為14.00%,光照與黑暗培養(yǎng)萌發(fā)指標差異顯著（P〈0.05）。3種試劑浸種，萌發(fā)率最高的為300mg/L赤霉素處理，萌發(fā)率為82%，其次為0.2%氯化鈣處理，萌發(fā)率為72%，1.5%硝酸鉀浸種萌發(fā)率為70%，對照萌
2、發(fā)率為60%o試劑處理，自然光照室溫培養(yǎng)20d至種子不再萌發(fā)為止測其根長，根長最長為硝酸鉀浸種，為7.38±0.62mm，其次為氯化餌浸種，為6.83±0.96mm，最短為赤霉素浸種，為5.94±0.90腿，對照為5.34±2.02腿。試劑處理與對照差異不顯著（P〉0.05）。光能促進云南龍膽種子萌發(fā)，試劑處理不僅能提高云南龍膽種子萌發(fā)率，而且能促進胚根與胚軸的伸長。本文采集自網(wǎng)絡，本站發(fā)布的論文均是優(yōu)質論文，供學和研宄使用，文中立場與本網(wǎng)站無關，版權和著作權歸原作者所有，如有不愿意被轉載的情況，請通知我們刪除匕轉載的信息，如果需要分享，請保留本段說明。關鍵詞：云南龍膽；種子萌發(fā)
3、；氯化鈣；赤霉素；硝酸鉀中圖分類號S567.239文獻標識碼A文章編號1007-7731(2017)10-0029-05Abstract：Inthisstudy,seedsofGentianayunnanensiswereusedasexperimentalmaterial，differentconcentrationsofgibberellin,calciumchlorideandpotassiumnitrate,differenttemperaturelevelsforsoakingseedsanddifferentlightconditionswereselectedtot
4、reattheseeds.Theresultsshowedthat10dayscultivationatroomtemperaturewasenoughfortheseedofGentianayunnanensistogerminatewhiletherewasnosignificantdifferenceforseedgerminationrateunderdifferentlevelsofsoakingtemperature.Thegerminationrateofseedsoakedindistilledwateratroomtemperatureand24h/dlight
5、conditionwas50%while60%inthenaturallightconditionsand14%inthedarklightconditions.Therewasasignificantdifferenceforseedgerminationratebetweendarkandlightconditions(P<0.05).Thehighestseedgerminationrateamongdifferentconcentrationsofreagentswas82%whichtreatedin300mg/Lgibberellinsolution,followin
6、gwas72%whichtreatedin0.2%calciumsolutionandthelastwas60%whichtreatedin1.5%potassiumsolutionwhile60%fortheCK.Aftertreatedwithdifferenttypesofreagents,rootlengthweremeasureduntiltheseedswerenolongertocontinuegerminateafter20dayscultivationatroomtemperatureandnaturallightcondition.Theresultsshow
7、edthatthelengthoflongestrootwas7.38+0.62mmwhichseedsweretreatedinpotassiumsolution,followingwas6.83+0.96mmwhichseedsweretreatedincalciumandthelastwas5.94±0.90minwhichseedsweretreatedingibberellinsolutionwhile5.34±2.02mmfortheCK.Therewasnosign
