干旱区生态环境知识资源中心(Arid): 积雪和丛枝菌根真菌网络对尖喙牻牛儿苗幼苗生长的影响

Arid

	积雪和丛枝菌根真菌网络对尖喙牻牛儿苗幼苗生长的影响
其他题名	Effects of Snow Cover and Arbuscular Mycorrhizal Fungi Network on the Seedling Growth of Erodium oxyrrhynchum
	吴楠 1; 张静 1; 王玥 2; 殷进飞 3; 张元明1
来源期刊	干旱区研究
ISSN	1001-4675
出版年	2018
卷号	35 期号:3 页码:624-632
中文摘要	通过野外原位监测及室内分析相结合,剖析了生物因素(土壤真菌菌丝网络)和物理因素(积雪改变)对古尔班通古特沙漠优势短命植物尖喙牻牛儿苗(Erodium oxyrrhynchum)生长的影响。结果表明:减雪与菌丝网络对该植物的生长具有显著复合生态效应。具体表现为: ①在叶片性状指标方面,PVC旋转造成丛枝菌根真菌菌丝网络被阻断后,尖喙牻牛儿苗各项叶片性状均有所下降。其中以减雪处理组最为明显,生长末期叶面积减少70.92%、叶周长减少37.26%。②在植株高度及根系长度方面,菌丝网络被阻断后,尖喙牻牛儿苗株高均有所下降,加雪、减雪处理时下降显著(P < 0.05,分别为40.45%、39.47%);根长在减雪组下降显著(47.75%)。③在植株地上地下生物量分配方面,菌丝网络被阻断后,尖喙牻牛儿苗地上、地下生物量均有所下降,其中减雪处理组下降显著(P < 0.05,分别为80.32%和65.74%)。可见,生物因素和物理因素对植物生长具有双重影响,其中减雪处理与菌丝网络阻隔处理对尖喙牻牛儿苗幼苗生长发育具有显著复合生态效应。为推测荒漠短命植物对冬季降水变化的适应机制及荒漠生态系统的保育提供了科学依据。
英文摘要	Compared to other desert ecosystem, snow cover in winter in the Gurbantunggut Desert is relatively stable and thick. Moisturizing and warming effects of snow cover provide the good conditions for the growth of desert ephemeral plants. However, the desert ephemeral plants can make use of favorable conditions in early spring of two months to complete the whole process of their rapid growth. They have an important role in the formation and succession of plant community as well as sand-fixation. The well-developed herbaceous layer in the Gurbantunggut Desert is mainly related to the existence of stable snow cover in winter. A comprehensive understanding that the ephemeral plant-arbuscular mycorrhizal fungi (AMF) how to respond to the changes of snowfall and snow cover in winter is the key to reveal the stability and maintenance mechanism of desert ecosystem under the climatic and environmental changes. However, it is not clear whether there is an interaction between AM fungi and snow cover change, and how about the growth and reproductive characteristics of ephemeral plants response to the interaction. Erodium oxyrrhynchum is a typical dominant desert ephemeral plant species growing in deserts in the Junggar Basin in north Xinjiang. Our research was carried out at the ecosystem in the Gurbantunggut Desert on the basis of long-term monitoring of plots. A dual influence of physical factor (snow cover) and biological factor (AMF) on the seedling growth of dominant desert ephemeral plants was verified based on the altered treatments of field snow cover (snow cover removal,snow cover addition and natural snow cover left in place) ,on-site mycorrhizal treatments (PVC tube rotated and static) and analysis in laboratory. A dual influence of snow cover removal-PVC rotated treatment on the seedling growth of E. oxyrrhynchum was detected. The results are as follows: ① In non-mycorrhizal treatment (rotated PVC tubes) , the leaf traits of E. oxyrrhynchum were lower than that under the mycorrhizal treatment (static PVC tubes) . The snow cover removal (- S) treatment exacerbated the above difference. Compared to the snow cover addition (+ S) treatment, the leaf area and leaf perimeter under the- S treatment were reduced by 70.92% and 37.26% respectively; ② Other surveys echoed the conclusions that the non-mycorrhizal treatment restricted the plant growth. In non-mycorrhizal treatment, the plant height and root length of E. oxyrrhynchum were also lower than that under the mycorrhizal treatments. Plant height was decreased by 40.45% under the (+ S) treatment and by 39.47% under the (- S) treatment. Root length was also decreased by 47.75% under the (- S) treatment; ③ The non-mycorrhizal treatment was also suggested to impede the biomass accumulation. In non-mycorrhizal treatment,both aboveground and underground biomasses were lower than that under mycorrhizal treatments. The snow cover removal (- S) treatment exacerbated the above difference. Under the- S treatment,the aboveground and underground biomasses were decreased by 80.32% and 65.74% respectively. In conclusion, the dual ecological influence of non-mycorrhizal treatment and- S treatment was found to impede the seedling growth of desert ephemeral plants of E. oxyrrhynchum. Our results could provide the scientific data for speculating the adaptation mechanism of desert ephemeral plants under winter precipitation change.
中文关键词	积雪 ; 丛枝菌根真菌 ; 尖喙牻牛儿苗(Erodium oxyrrhynchum) ; 真菌菌丝 ; 短命植物 ; 古尔班通古特沙漠
英文关键词	snow cover arbuscular mycorrhizal fungi (AMF) Erodium oxyrrhynchum fungal hyphae ephemeral plant Gurbantunggut Desert
语种	中文
国家	中国
收录类别	CSCD
WOS类目	PLANT SCIENCES
WOS研究方向	Plant Sciences
CSCD记录号	CSCD:6245061
来源机构	中国科学院新疆生态与地理研究所 ; 新疆师范大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/237654
作者单位	1.中国科学院新疆生态与地理研究所, 中国科学院干旱区生物地理与生物资源重点实验室, 乌鲁木齐, 新疆 830011, 中国; 2.新疆师范大学生命科学学院, 乌鲁木齐, 新疆 830054, 中国; 3.中国科学院新疆生态与地理研究所;;中国科学院大学, 中国科学院干旱区生物地理与生物资源重点实验室;;, 乌鲁木齐;;, 新疆;;北京 830011;;100049, 中国
推荐引用方式 GB/T 7714	吴楠,张静,王玥,等. 积雪和丛枝菌根真菌网络对尖喙牻牛儿苗幼苗生长的影响[J]. 中国科学院新疆生态与地理研究所, 新疆师范大学,2018,35(3):624-632.
APA	吴楠,张静,王玥,殷进飞,&张元明.(2018).积雪和丛枝菌根真菌网络对尖喙牻牛儿苗幼苗生长的影响.干旱区研究,35(3),624-632.
MLA	吴楠,et al."积雪和丛枝菌根真菌网络对尖喙牻牛儿苗幼苗生长的影响".干旱区研究 35.3(2018):624-632.