This study was to investigate the physiological response of tea cultivar Longjing 43 seedlings to different aluminum (Al) concentrations by hydroponic culture. The results revealed the biomass increment, relative growth rate (RGR) and electron transfer efficiency (ETR) of the tea plants under low Al concentrations (0.2 and 0.4βmmol·L-1) were significantly higher than the control group. However, The MDA content in roots showed an opposite trend. As Al concentration continued to increase, the increase rate of ETR began to decline and the growth rate became flat but still a great number of fresh roots were coming up. When Al concentration was higher than 1βmmol·L-1, the efficiency of light energy conversion in PSⅡ(Fv/Fm) and ETR showed dramatic decline. Meanwhile, RGR decreased and the growth of tea plant was also inhibited. Simultaneously, the results of Al contents in the different tissues of tea plants followed lateral roots, mature leaves > stems > main roots > young leaves. More Al was found in the lateral roots with Al concentration increasing. The study suggested that when Al concentration was lower than 1.0βmmol·L-1, it could promote the growth of tea plants, but the growth would be inhibited under an Al-free environment or the Al concentration was higher than 1 mmol·L-1. These results laid a foundation for further study on the physiological mechanism of how Al would promote the growth of tea plants.
Key words
physiology response /
promote growth /
tea plant /
aluminum
{{custom_sec.title}}
{{custom_sec.title}}
{{custom_sec.content}}
References
[1] 杨建立, 何云峰, 郑绍建. 植物耐铝机理研究进展[J]. 植物营养与肥料学报, 2005, 11(6): 836-845.
[2] Osawa H, Ikeda S, Tange T.The rapid accumulation of aluminum is ubiquitous in both the evergreen and deciduous leaves of theaceae and ternstroemiaceae plants over a wide pH range in acidic soils[J]. Plant and Soil, 2013, 363(1): 49-59.
刘腾腾, 郜红建, 宛晓春, 等. 铝对茶树根细胞膜透性和根系分泌有机酸的影响[J]. 茶叶科学, 2011, 31(5): 458-462.
[3] Yang J L, Zhu X F, Peng Y X, et al.Cell wall hemicellulose contributes significantly to aluminum adsorption and root growth in arabidopsis[J]. Plant Physiology, 2011, 155(4): 1885-1892.
[4] Lin Y, Chen J.Aluminum resistance and cell-wall characteristics of pineapple root apices[J]. Journal of Plant Nutrition and Soil Science, 2013, 176(5), 795-800.
[5] 朱晓芳. 拟南芥细胞壁半纤维素结合铝的机制及其调控[D]. 杭州: 浙江大学, 2014.
[6] 小西茂毅. 铝对茶树生长的促进作用[J]. 茶叶, 1995, 21(3): 18-22.
[7] Ghanati F, Morita A, Yokota H.Effects of aluminum on the growth of tea plant and activation of antioxidant system[J]. Plant and Soil, 2005, 276(1/2): 133-141.
[8] Hajiboland R, Bahrami R S, Barceló J, et al.Mechanisms of aluminum-induced growth stimulation in tea (Camellia sinensis)[J]. Journal of Plant Nutrition & Soil Science, 2013, 176(4):616-625.
[9] 高俊凤. 植物生理学实验技术[M]. 西安: 世界图书出版公司, 2000.
[10] 曹林, 吴玉环, 章艺, 等. 外源水杨酸对铝胁迫下菊芋光合特性及耐铝性的影响[J]. 水土保持学报, 2015, 29(4): 260-266.
[11] Kinraide T B, Poschenrieder C, Kopittke P M.The standard electrode potential (Eθ) predicts the prooxidant activity and the acute toxicity of metal ions[J]. Journal of Inorganic Biochemistry, 2011, 105(11): 1438-1445.
[12] 潘根生, Masaki Tsuji, 小西茂毅. 茶根尖细胞各胞器分部的分离及其铝的分布[J]. 浙江农业大学学报, 1991, 21(3): 33-36.
[13] 于翠平. 茶树耐铝的基因型差异及机理研究[D]. 杭州: 浙江大学, 2014.
[14] Morishita T, Yamaguchi A, Ohta Y.Sulphur accumulation by tomato and rice root in relation to transport of heavy metals[J]. Soil Science and Plant Nutrition, 1983, 29(2): 219-225.
PDF(1118 KB)
浙公网安备 33019902000101号 
