单 位：
安徽师范大学生命科学学院/安徽省重要生物资源保护与利用研究重点实验室
摘 要：
采用盆栽砂培法,研究3种不同的土壤pH值(4.2、5.2和6.2)对乌饭树(Vaccinium bracteatum Thunb.)和兔眼蓝莓(Vaccinium ashei Reade)品种"灿烂"生长及相关生理指标的影响。结果表明:乌饭树和蓝莓的生物量、叶绿素含量及根系活力均在土壤pH 6.2时最低,而其生物量与根系活力分别在pH 5.2和pH 4.2时最高。乌饭树和蓝莓根和叶部的可溶性糖及可溶性蛋白质含量均在pH 6.2时最高,分别在pH 5.2和pH 4.2时最低。在土壤pH 5.2时,乌饭树的根、茎、叶中P、Fe和Zn含量较高;当土壤pH 4.2时,蓝莓根部P和Fe含量、茎部Fe含量及叶部Fe和Zn含量均相对较高。乌饭树和蓝莓根或叶的POD和CAT活性及MDA含量均在pH 6.2时最高,而其最低值分别出现在pH5.2和pH 4.2时。综上,乌饭树和蓝莓分别在土壤pH 5.2和pH 4.2时生长最好,pH 6.2的土壤环境对二者生长均有抑制作用,尤其以蓝莓较为明显。
译 名：
Physiological response to different soil pH values between Vaccinium bracteatum and Vaccinium ashei
作 者：
LI Qingqing;LU Shanshan;ZHANG Hong;YANG Yan;XIAO Jiaxin;Anhui Provincial Key Laboratory of the Concervation and Exploitation of Biological Resources/College of Life Sciences,Anhui Normal University;
关键词：
soil pH;;Vaccinium bracteatum;;Vaccinium ashei;;physiological response
摘 要：
Blueberry(Vaccinium spp.) is well known for its rich anthocyanins and other bioactive compounds,which contributes to prevent from cardiovascular disease and other chronic illnesses.Thereby,many countries including China have attached great importance to the economic value and development prospect of blueberry.However,the main root of blueberry tree is not obvious but exceedingly slender,intertwined and lack of root hair.Meanwhile,blueberry prefers acidic even strongly acidic soil,and its most suitable pH value of culture is from 3.8 to 5.0.As the soil pH value of cultivating blueberry is generally higher than 5.0,large amounts of sulfur powder are applied to reduce the soil pH value.Wufanshu(Vaccinium bracteatum Thunb.),belonging to the same family and genus with blueberry,is a stock with developed root system,strong barren tolerance and extensively ecological adaptability,which has been cultivated as a kind of economic or landscaping plant species.There are many examples of grafting and improving native blueberry with Wufanshu scion in folk.Grafting blueberry with Wufanshu is well worth popularizing in blueberry cultivation at least in the Yangtze River area of China.However,few studies have been reported on the effects of soil pH values on the growth of different Vaccinium plants.To evaluate the effects of different soil pH values on the growth and relative physiological indices of Wufanshu(V.bracteatum) and rabbiteye blueberry(Vaccinium ashei Reade) cv.Brightwell plants,three different soil pH values(4.2,5.2and 6.2) were applied to the 9-month-old plants of Wufanshu and rabbiteye blueberry under greenhouse conditions.Plants were grown in the medium of V(sand)∶V(perlite)=1∶1 and irrigated every 2 days with half-strength Hoagland's No.2nutrient solutions with different pH values(4.2,5.2,and 6.2).Leaves,stems and roots were separately sampled after 187 days to determine their relative physiological indices.The results showed that the biomass,chlorophyll content and root activity of Wufanshu and blueberry were the lowest at pH 6.2 level,but the maxima of the biomass and root activity in Wufanshu and blueberry were found at pH 5.2 and 4.2levels,respectively.The soluble sugar and protein contents of Wufanshu and blueberry were the highest at pH 6.2,and the lowest ones were detected at pH 5.2 and 4.2,respectively.The contents of phosphorus(P),ferrum(Fe) and zinc(Zn) in the roots,stems and leaves of Wufanshu were the highest at pH 5.2 level;however,the contents of P and Fe in the roots,Fe in the stems,and Fe and Zn in the leaves of blueberry were the highest at pH 4.2 level.The activities of peroxidase(POD) and catalase(CAT),and malondialdehyde(MDA) content of Wufanshu and blueberry were the highest at pH 6.2 level,while the minima of them were presented at pH 5.2 and 4.2,respectively.These results indicate that pH 5.2 and pH 4.2 are the optimal soil pH values for the growth of Wufanshu and blueberry plants,respectively;however,soil pH 6.2 will inhibit their growth,especially the blueberry.
