| 不同光质对水培脱毒马铃薯光合与结薯特性的影响 |
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| 引用本文： | 唐道彬,张晓勇,王季春,蒋玉春,敬夫,罗玉龙,白慧,黄廷荣,舒进康,陈永春.不同光质对水培脱毒马铃薯光合与结薯特性的影响[J].园艺学报,2017,44(4):691-702. |
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| 作者姓名： | 唐道彬 张晓勇 王季春 蒋玉春 敬夫 罗玉龙 白慧 黄廷荣 舒进康 陈永春 |
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| 作者单位： | （1西南大学农学与生物科技学院，重庆 400716；2南方山地农业教育部工程研究中心，重庆 400716；3重庆市马铃薯工程技术研究中心，重庆 400716；4重庆市酉阳县农业委员会，重庆 408800；5重庆市巫溪县农业委员会，重庆 405800） |
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| 基金项目： | 重庆市应用开发重点项目(cstc2014yykfB80002)，科技部星火计划项目(2012GA8110021) |
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| 摘 要： | 以红、蓝、红蓝(7︰1)、红蓝(5︰1)和白光5种光质LED灯作为光源,其中白光为对照,研究光质对水培脱毒马铃薯植株叶片发育、叶片光合性能、叶绿素荧光特性和结薯特性的影响。结果表明,在红蓝光(5︰1)处理条件下,水培马铃薯植株生长前期叶面积系数、叶绿素含量、气孔密度、气孔导度(Gs)均高于其他处理,P_n、Φ_(PSⅡ)、q_P、和ETR等显著高于白光处理,块茎形成和膨大最快。且定植60 d时叶绿素含量下降,P_n和PSⅡ活性中心开放程度显著下降,成熟期提前,微型薯产量和成薯率最高。在单色红光处理下,植株叶面积系数、叶绿素含量、G_s、P_n、F_v/F_o、Φ_(PSⅡ)和q_P下降,NPQ升高,块茎的形成和膨大缓慢,产量最低。在单色蓝光处理下前期叶片生长较快,块茎形成早,但不利于匍匐茎的形成,并引起叶片早衰,制约了块茎产量的提高。基于上述结果,光质调控前期可增加红光比例,诱导匍匐茎形成,后期增加蓝光比例,促进块茎形成和膨大,提高块茎的数量和产量。
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| 关 键 词： | 马铃薯 微型薯 水培 LED光质 光合特性 荧光特性 结薯性能 |
Effect of Different LED Light Qualities on the Photosynthesis and Tuberization of Virus-free Potato in Hydroponic Culture |
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| TANG Daobin,,ZHANG Xiaoyong,WANG Jichun,,JIANG Yuchun,JING Fu,LUO Yulong,BAI Hui,HUANG Tingrong,SHU Jinkang,CHEN Yongchun.Effect of Different LED Light Qualities on the Photosynthesis and Tuberization of Virus-free Potato in Hydroponic Culture[J].Acta Horticulturae Sinica,2017,44(4):691-702. |
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| Authors: | TANG Daobin ZHANG Xiaoyong WANG Jichun JIANG Yuchun JING Fu LUO Yulong BAI Hui HUANG Tingrong SHU Jinkang CHEN Yongchun |
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| Institution: | （1College of Agronomy and Biotechnology，Southwest University，Chongqing 400716，China；2Engineering Research Center of Southern Mountain Agriculture，Ministry of Education，Southwest University，Chongqing 400716，China；3Potato Engineering and Technology Research Center，Chongqing 400716，China；4Youyang Agriculture Commission，Chongqing 408800，China；5Wuxi Agriculture Commission，Chongqing 405800，China） |
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| Abstract: | The differences of virus-free potato's plant leaf growth,photosynthesis,chlorophyll fluorescence and tuberization in different light qualities were studied.Taking white light as control,the red light,red + blue light generated by light-emitting-diode were applied to study the influences of different LED light qualities such as white,red,blue,red/blue (7 ∶ 1) and red/blue (5 ∶ 1) on favorite virus-free potato plantlet.It showed that,under different light qualities,there were differences in photosynthesis and tuberization:the red/blue (5 ∶ 1) treatment resulted in better leaf area index,chlorophyll content,stomatal density,Ci,qp,Tr and ΦPSI compared with white light treatment;remarkably-improved Pn,Gs and ETR;earliest tuberization compared with white light treatment.However,the contents of chlorophyll decreased,Pn and ΦPSⅡ remarkably-decreased on the 60th day.It matured ahead of time with lower stolon.The micro-tuber yield and tuberization rate are the highest.Red light treatment resulted in decreased leaf area index,chlorophyll content,Gs,Pn,Fv/Fo,ΦPSⅡ and qp,increasedNPQ,slow-down tuber formation and lowest final yield.Furthermore,the blue light treatment was inhibit the formation of stolon and the limit the number of micro-tuber per plant.The analysis indicated that higher red light proportion in light quality can promote the formation of stolon while higher blue light proportion can promote the tuber formation and expansion,shorten the production cycle.Basing on the results,it is advisable to increase the red light proportion in the earlier stage of light adjustment to induce the formation of stolon,and to increase the blue light proportion in the late period to promote the tuber formation and expansion,increase the number and yield of tuber. |
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| Keywords: | virus-free potato micro-tuber hydroponic culture LED light quality photosynthesis chlorophyll fluorescence tuberization |
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