Effects of Root Zone Temperature on Contents of Mineral Elements and Absorbent Functions of Cucumber Seedlings Root

doi:10.3321/j.issn:1000-7091.2002.04.004

Abstract

Abstract: Experiments of root zone temperaturet reatments were carried out at seedling stage of cucumber ( cucumis sativus L. ) in solar greenhouse. Comparison of sub-optimal treatment and low temperature treatment with optimal temperature treatment indicated that contents of K, Mg in root increased, while contents of N, P, Ca, Fe, Mn, Cu, Zn in root decreased; contents of N, K, Ca, Mg, Fe in stem increased, while contents of P, Mn, Cu, Zn in stem decreased; contents of K in leaf increased, while contents of N, P, Ca, Mg, Fe, Mn, Cu, Zn in leaf decreased. Cultivars Jinchun No. 3 showed larger root resistance to low temperature stress in maintaining relative stabilization of some contents of mineral elements than that of cultivars Jinchun No. 2; Volume and absorbent area of root decreased, while succinic dehy drog enase activity of root increased. Low ering root zone temperature increased contents of some elements in seedlings, but contents of elements( do not include K) in leaf decreased. Grow th and development of shoot of cucumber seedlings ult imately were hindered by these decreased elements that maybe were limiting factors.

Key words: Root zone temperature, Cucumber, Mineral element, Absorbent function

CLC Number:

S642.2

REN Zhi-yu, WANG Xiu-feng. Effects of Root Zone Temperature on Contents of Mineral Elements and Absorbent Functions of Cucumber Seedlings Root[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2002, 17(4): 13-17. doi: 10.3321/j.issn:1000-7091.2002.04.004.

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