干旱区生态环境知识资源中心(Arid): 四种藜科植物多型性种子形态及萌发率对绵羊瘤胃消化的响应

Arid

	四种藜科植物多型性种子形态及萌发率对绵羊瘤胃消化的响应
其他题名	Response of morphology and germinability of heteromorphic seeds of four Chenopodiaceae species to sheep rumen digestion
	王树林; 吴飞; 陈乙实; 景鹏成; 鲁为华; 孙海荣; 李娜娜; 靳省飞
来源期刊	生态学杂志
ISSN	1000-4890
出版年	2018
卷号	37 期号:1 页码:119-127
中文摘要	藜科植物角果藜(Ceratocarpus arenarius L.) 、盐生草(Halogeton glomeratus C.A.Mey.) 、野榆钱菠菜(Atriplex aucheri Moq.)和紫翅猪毛菜(Salsola affinis C.A.Mey.)都具有种子多型性现象,每种植物均可产生2种不同类型的种子。以这8种种子为研究对象,采用瘤胃瘘管尼龙袋法,对瘤胃消化前后种子的长、宽、厚、千粒重和萌发率进行测定,研究了4种藜科植物的多型性种子对绵羊瘤胃消化的反应,并探讨了藜科植物种子多型性结实策略的意义。结果表明:种子经绵羊瘤胃消化后,种子颜色变暗,附属结构(苞片、种毛和种翅)被消化,暴露出内部的环形胚;随消化时间的延长,种子的长、宽、厚和千粒重形态学指标均显著降低(P < 0.05),且它们与消化时间之间分别具有形如Y = 1.00 + 7.92e~(-0.04X)(R~2 = 0.92,P<0.0001) 、Y = 1.28 + 4.63e~(-0.11X) (R~2 = 0.91,P < 0.0001) 、Y = 0.70 + 1.36e~(-0.09X)(R~2 = 0.92,P<0.0001)和Y = 1.48+9.57e~(-0.20X)(R~2 = 0.36,P<0.0001)的函数关系;绵羊瘤胃消化能打破藜科种子的休眠特性,显著提高种子萌发率(P<0.05),除野榆钱菠菜的小苞片种子随瘤胃消化时间的延长萌发率逐渐增加外,其余种子的萌发率均随瘤胃消化时间的延长呈现先增高后降低的趋势,且经瘤胃消化24 h后,8种种子的萌发率均>40%,较消化前显著提高(P<0.05),表明这8种种子均能通过绵羊进行消化道传播。同一种植物不同类型的种子对绵羊瘤胃消化的反应具有趋同性。4种藜科植物不仅能通过两头下注的繁殖策略适应严酷的荒漠环境,还能通过放牧绵羊进行种子的消化道传播,增加了种群扩散的途径,这是植物适应荒漠多变环境的一种生存方式。
英文摘要	The objectives of this experiment were to study the response of seeds to digestion in the rumen of sheep and to discuss the significance of seed heteromorphism phenomenon of Chenopodiaceae plants.The seeds were from the following species: Ceratocarpus arenarius L.,Halogeton glomeratus C.A.Mey.,Atriplex aucheri Moq.and Salsola affinis C.A.Mey.;each plant can produce two different types of seeds.After determining their morphological characteristics,the seeds were put into nylon bags which were then placed in the rumen of sheep through a fistula.The bags were removed at different times and then the seed length,width and thickness and germination rates were determined.The results showed that the seeds became dark after digestion,the seed appendix structures (such as bracts,seed trichomes and seed wings) of all four species were digested by rumen fluid of sheep and the internal annular embryos were exposed.Digestion time had significant effect on the seed length,width,thickness and 1000-seed weight of the four plant species (P < 0.05).The relationships between seed length,width,thickness,weight of 1000 seeds and digestion time were described by the equations Y = 1.00 + 7.92e~(-0.04X)(R~2 = 0.92,P<0.0001),Y = 1.28+4.63e~(-0.11X)(R~2 = 0.91,P<0.0001),Y = 0.70+1.36e~(-0.09X)(R~2 = 0.92,P<0.0001) and Y = 1.48+9.57e~(-0.20X)(R~2 = 0.36,P<0.0001) respectively,where X is time in hours.Sheep rumen digestion could break the seed dormancy of Chenopodiaceae plants,significantly improving seed germination rates (P<0.05).In addition to the gradually increased germination rate of A.aucheri small-bract seeds with the extension of rumen digestion time,the seed germination rates of the rest seeds decreased after an initial increase.The seed germination rates were all >40% when digestion time was >12 h,which increased significantly compared with seeds that were not digested (P < 0.05).These eight kinds of Chenopodiaceae seeds all can disperse by sheep digestive tract.This study indicates that different types of seeds produced by the same species can respond to sheep rumen digestion in convergence.Chenopodiaceae plants not only can reproduce bybet-hedgingstrategy to adapt to the harsh desert environment,but also can spread by grazing sheep digestive tract to increase the opportunity of population dispersal.This is a survival way of plants to adapt to changing environment in desert.
中文关键词	藜科植物 ; 种子多型性 ; 瘤胃消化 ; 萌发率 ; 消化道传播
英文关键词	Chenopodiaceae plant seed heteromorphism rumen digestion germination rate endozoochore
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:6156138
来源机构	石河子大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238180
作者单位	石河子大学动物科技学院, 石河子, 新疆 832003, 中国
推荐引用方式 GB/T 7714	王树林,吴飞,陈乙实,等. 四种藜科植物多型性种子形态及萌发率对绵羊瘤胃消化的响应[J]. 石河子大学,2018,37(1):119-127.
APA	王树林.,吴飞.,陈乙实.,景鹏成.,鲁为华.,...&靳省飞.(2018).四种藜科植物多型性种子形态及萌发率对绵羊瘤胃消化的响应.生态学杂志,37(1),119-127.
MLA	王树林,et al."四种藜科植物多型性种子形态及萌发率对绵羊瘤胃消化的响应".生态学杂志 37.1(2018):119-127.