Growth response to the stress of low osmotic potential,salinity and high pH in cultured shoot of Chinese poplars |
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| Authors: | Jae-Myung Kang Katsumi Kojima Yuji Ide Satohiko Sasaki |
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| Institution: | (1) Faculty of Agriculture, The University of Tokyo, 113 Tokyo, Japan;(2) Asran Natural Environmental Science Center, The University of Tokyo, 113 Tokyo, Japan |
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| Abstract: | In vitro cultured shoots of three Chinese poplar species (Populus tomentosa, P. alba cv. Pyramidalis andP. euphratica) and an improved poplar (FS-51), as a control, were exposed to the stress of low osmotic potential, salinity and high pH,
and the shoot growth was measured.P. tomentosa andP. euphratica could grow even under the high osmotic stress (0.5m mannitol; −1.7 MPa).P. euphratica shoots which were previously cultured on the medium containing 0.7m mannitol (−2.4 MPa) recovered its growth after being transplanted to the medium without mannitol. The shoot growth ofP. euphratica was not so reduced even on the medium containing 100 mM NaCl. However, growth of the other poplars markedly reduced with
10 mM NaCl. Medium pH (pH 5.8–10) also did not affect the shoot growth ofP. euphratica. These poplars have different tolerance to the stresses in cultured shootin vitro. P. euphratica was extremely tolerant to the stresses which are possible to damage plants in dry land.
A part of this study was presented at the 104th Annual Meeting of the Japanese Forestry Society. (1993). |
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| Keywords: | Chinese poplars high pH low osmotic potential salinity stress response |
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