修剪物与茶多酚对茶树矿质吸收及根系有机酸分泌的影响

doi:10.13305/j.cnki.jts.2014.06.021

Abstract

Abstract: The effects of aqueous solution of tea pruning materials and tea polyphenols on tea plant [Camellia sinensis (L.)] growth and the mechanisms were investigated using hydroponic culture in this paper. The plants were harvested and root exudates were collected after growing periods of 15, 35, 55, 75 and 95 d. The contents of organic acids in the secretes from roots were determined using a HPLC equipped with C₁₈ column after passed through cation and anion exchange resin and concentrated. Besides, the dry weight, tea polyphenols and mineral uptake were analyzed. The results showed that tea polyphenols added in nutrient solution inhibited the uptake of Ca, Mg, Fe, Mn, Zn and growth rate and induced citric and succinic acids efflux from roots. However, the aqueous solution of tea pruning materials added in nutrient solution promoted the uptake of K, Ca, Mg, Fe, Mn, Zn, Al and growth rate and at the meantime induced oxalic, malic, citric and succinic acids efflux from roots. Besides, the aqueous solution of tea pruning materials also lowered pH of collection solution, which were closely linked with organic acids secretion changes, hinting tea pruning materials may result in soil acidification.

Key words: Camellia sinensis (L.), root exudates, tea pruning, mineral uptake

CLC Number:

PANG Xin, WANG Yuhua, WANG Weidong, YIN Ying, SHU Zaifa, CHEN Xuan, LI Xinghui. Effects of Tea Pruning Materials and Tea Polyphenols on Organic Acids Secretion and Mineral Uptake in Tea Plant[J]. Journal of Tea Science, 2014, 34(6): 591-600.

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Effects of Tea Pruning Materials and Tea Polyphenols on Organic Acids Secretion and Mineral Uptake in Tea Plant

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