Effects of Root Zone Temperature on Endogenous Hormone Contents of Blossoming and Bearing Fruits Cucumbers and Tomatoes

doi:10.3321/j.issn:1000-7091.2007.02.017

Abstract

Abstract: Effects of different root zone temperature on changes of endogenous hormone contents in leaves were studied by man-made heating while cucumbers and tomatoes were blossoming and bearing fruits in solar greenhouse. The results indicated that contents of leaf gibberellic acid (GA₃), indol-3yl-acetic acid (IAA), zeatin riboside (ZR) increased with heating root zone and their contents had a rising tendency as temperature rising. There were significant differences between 15℃ treatment, 20℃ treatment, 25℃ treatment and natural root temperature. Abscisis acid (ABA) content decreased as temperature rising and there were significant differences between 20℃ treatment, 25℃ treatment and natural root temperature. It showed that changes of root zone temperature affected synthesis, transportation and distribution of endogenous hormones in cucumbers and tomatoes.

Key words: Root zone temperature, Cucumber, Tomato, Endogenous hormone

CLC Number:

S642.2

REN Zhi-yu, LU Xing-xia, LI Jing, LI Xue-ting. Effects of Root Zone Temperature on Endogenous Hormone Contents of Blossoming and Bearing Fruits Cucumbers and Tomatoes[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2007, 22(2): 64-66. doi: 10.3321/j.issn:1000-7091.2007.02.017.

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