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光照、温度和盐分对梭梭种子萌发的影响

黄振英, 张新时, Gutterman Y, 郑光华

中科院植物研究所植被数量生态学开放研究实验室.北京 100093；Ben-Gurion University of the Negev, Jacob Blaustein Institute for Desert Research and Department of Life Sciences. Sede Boker Campus 84990

摘要

梭梭是我国西北荒漠中分布的多年生植物,属中亚荒漠植被成分。其种子萌发的最适温度为10℃,亚适宜温度为15--20℃。从20℃起,温度越高,萌发比率越低。种子无论在光下和暗中都能萌发,萌发率无显著性差异。浓度低于0.2mol/L的NaCl溶液对萌发的影响不大;但从0.8mol/L起,萌发率随着浓度增高而降低,直至为零。将在盐溶液中处理9d的种子转移至蒸馏水后,原来较高浓度下的种子具有较高的萌发恢复率。不同浓度下的种子的萌发率和萌发恢复率要比蒸馏水中的低,表明NaCl处理后的部分种子永久地失去萌发力。

关键词： 梭梭; 光照; 温度; 土壤盐分; 种子萌发; 萌发恢复

Influence of light, temperature and salinity on the seed germination of Haloxylon ammodendron

Huang Zhenying, Zhang Xinshi, Gutterman Y, Zheng Guanghua

Laboratory of Quantitative Vegetation Ecology,Institute of Botany,Chinese Academy of Sciences.Beijing 100093；Israel；Laboratory of Seed Physiology,Beijing Botanical Garden,Chinese Academy of Sciences.Beijing 100093

Abstract

The germination characteristics of Haloxylon ammodendron, a shrubby perennial distributed in many areas of deserts of Northwest China, and in the Central-Asian Desert phytogeographic region, were studied. The optimal temperature for germination was 10deg C, the sub-optimal temperatures wee 15 to 20deg C. From 20deg C, the higher the temperature, the lower the percentages of germination. No difference was found between the germinability of its seeds in light and in darkness. Germination was not affected by NaCl at concentrations below 0.2 mol/L, and was decreased by NaCl at higher concentrations, and fell to nearly 0 after 0.8 mol/L. Seeds that were incubated in NaCl solution for 9 d recovered after being transferred to distilled water and the percentage of recovery from high salinity concentrations was higher than low concentrations. The percentages of germination in NaCl and those after being transferred to distilled water were lower than the non-saline control, indicating that parts of the NaCl treated seeds have permanently lost their germination ability.

Key words: Haloxylon amrwdendron;Light;Temperature;Soil salinity;Seed germination;Recovery of germination

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引用本文：

黄振英, 张新时, Gutterman Y, 郑光华. 光照、温度和盐分对梭梭种子萌发的影响[J]. 生理学报 2001; 53 (3): .

Huang Zhenying, Zhang Xinshi, Gutterman Y, Zheng Guanghua. Influence of light, temperature and salinity on the seed germination of Haloxylon ammodendron. Acta Physiol Sin 2001; 53 (3): (in Chinese with English abstract).