红砂和珍珠对极端环境的生理响应与调节机制

摘要/Abstract

摘要： 红砂和珍珠的生理生态特性随其生长的环境条件而变化；长期生长在一起的红砂和珍珠其生理生态特性具明显的差异,两者适应逆境的机制亦不相同。红砂和珍珠作为超旱生植物,其生理生态学特性明显区别于其他沙生植物；生长在山前地带的红砂和珍珠,可以在极低的水势条件下保证其生命活动,低的水势可能与渗透调节物质（如大量的脯氨酸）的存在有关,这类物质增加了植物的吸水能力；红砂和珍珠的光抑制程度较其他沙生植物要高得多,且光抑制的产生已对两种灌木光合色素产生了破坏,然而在条件稍好的早晚光抑制可得到恢复。

关键词: 红砂, 珍珠, 气体交换, 水势, 渗透调节

Abstract: Reaumuria soongorica and Salsola passerine have significant differences in ecophysiological characteristics, and they change with environmental variation although they live together for a long term. Their adaptive mechanisms to environmental stresses are very different. As two extreme xerophytes, Reaumuria soongorica and Salsola passerina differ significantly from other psammophytes in ecophysiological characteristics; they can survive in lower water potential, even grow in the piedmont area. Low water potential may be related to the existence of osmosis-regulating substance, such as proline, which can strengthen their water absorption capacity. Compared to other psammophytes, Reaumuria soongorica and Salsola passerina have higher degree of photo-inhibition under same condition, and photo-inhibition can lead to destruction of the photosynthetic pigment, nevertheless, the photo-inhibition can be repaired under suitable conditions in the morning and evening.

Key words: Reaumuria soongorica, Salsola passerine, gas exchange, water potential, osmosis regulating

中图分类号:

Q945

周海燕, 谭会娟, 张志山, 贾晓红, 张景光, 樊恒文. 红砂和珍珠对极端环境的生理响应与调节机制[J]. 中国沙漠, 2012, 32(1): 24-32.

ZHOU Hai-yan, TAN Hui-juan, ZHANG Zhi-shan, JIA Xiao-hong, ZHANG Jing-guang, FAN Heng-wen. Physiological Response and Adjustment Mechanism of Reaumuria soongorica and Salsola passerina to Extreme Environment[J]. JOURNAL OF DESERT RESEARCH, 2012, 32(1): 24-32.

参考文献

[1]丘明新,刘家琼.珍珠植物群落的研究[J].生态学报,1982,2（4）:311-318.

[2]兰州沙漠研究所沙坡头沙漠科学研究站.包兰铁路沙坡头段固沙原理与措施[M].银川:宁夏人民出版社,1991.

[3]梁学功,王刚.沙坡头人工固沙区种子库动态及其对植被演替方向的预测[M]//沙坡头沙漠试验研究站年报.兰州:甘肃科学技术出版社,1993:108-119.

[4]王刚,梁学功.沙坡头人工固沙区的种子库动态[J].植物学报,1995,37（3）:231-237.

[5]中国植被编辑委员会.中国植被[M].北京:科学出版社,1980.

[6]中国饲用植物志编辑委员会.中国饲用植物志（第一卷）[M].北京:农业出版社,1987.

[7]马茂华,孔令韶.新疆呼图壁外缘的琵琶柴生物生态学特性研究[J].植物生态学报,1998,5（4）:87-93.

[8]曾彦军,王彦荣,张宝林,等.红砂和猫头刺种子萌发生态适应性的研究[J].草业学报,2000,9（3）:36-42.

[9]陈拓,马健,冯虎元,等.阜康典型荒漠植物稳定碳同位素值的环境分析[J].干旱区地理,2002,25（4）:342-345.

[10]刘家琼,邱明新,蒲锦春,等.我国荒漠典型超旱生植物——红砂[J].植物学报,1982,24（5）:485-488.

[11]曾彦军,王彦荣,张宝林,等.红砂种群繁殖特性的研究[J].草业学报,2002,11（2）:65-70.

[12]Xu L,Wang Y L,Wang X M,et al.Genetic structure of Reaumuria soongorica population in Fukang desert,Xinjiang and its relationship with ecological factors[J].Acta Botanica Sinica,2003,45(7):787-794.

[13]王彦荣,曾彦军,付华,等.过牧及封育对红砂荒漠植被演替的影响[J].中国沙漠,2002,22（4）:322-327.

[14]贾荣亮,周海燕,谭会娟.超旱生植物红砂与珍珠光合生理生态日变化特征初探[J].中国沙漠,2006,26（3）:450-454.

[15]宋维民,周海燕,贾荣亮,等.土壤逐渐干旱对4种荒漠植物光合作用和海藻糖含量的影响[J].中国沙漠,2008,28（3）:450-454.

[16]陈福明.用混合液法测定叶绿素含量[J].林业科技通讯,1984（2）:4-8.

[17]朱广廉,邓兴旺,左卫线.植物体内游离脯氨酸的测定[J].植物生理学通讯,1984（1）:35-37.

[18]刘光崧.土壤理化分析与剖面描述[M].中国标准出版社,1996.

[19]周海燕,李新荣,樊恒文,等.极端条件下几种锦鸡儿属灌木的生理特性[J].中国沙漠,2005,25(2):182-190.

[20]Zhou H Y,Li S G,Li X R,et al.Ecophysiological evidences for the competition strategy of two psammophytes in Horqin Sandy Land,Nei Mongol[J].Acta Botanica Sinica,2004,46(3):284-293.