青藏高原特有种砂生槐不同种源地种子萌发特征研究
Seed Germination of Different Provenances of Sophora moorcroftiana, an Endemic Species to the Qinghai-Tibetan Plateau
-
摘要: 对采自6个种源地砂生槐的种子进行了萌发研究,分析了种子大小、萌发特性与海拔之间的关系。结果表明:1)每荚种子数变幅为2.96 4.50粒;种子千粒质量变幅为30.639 47.415 g;种子纵径变幅为4.314~4.962 mm;种子横径变幅为3.244~3.693 mm;种子纵横径比变幅为1.306~1.383 ,差异较小。方差分析结果显示,种源间每荚种子数(F=8.52**)、千粒质量(F=19.73**)、种子纵径(F=6.17**)和种子横径(F=5.79**)差异均达到极显著水平,而种子纵径与横径的比值差异不显著(F=1.47)。2) 6个种源砂生槐种子发芽率变幅为43.16% 90.03% 。其中萨迦种源发芽率90.03%为最高,最低是米瑞种源为43.16% 。3) 6个砂生槐种源的种子在发芽起始时间上仅差异1 d;萌发持续时间在14~23 d之间,种源间持续发芽时间差异最多达到9 d;萌发高峰期在17~27 d之间,种源间差异较大,其中萨迦种源最短,朗县种源最长。4) 每荚种子数随着海拔的升高而显著降低(R=-0.844 3,PR=0.614 3,PR=-0.505 6,P>0.05); 种子萌发持续时间与海拔具有显著的负相关关系(R=-0.883 6,PR=0.804 7,P<0.05)。Abstract: The characteristics of seed germination of six Sophora moorcroftiana provenances were examined, and the relationships among seed size, germination and elevation were analyzed. The results indicated that: 1) the number of seed per pod varied from 2.96 to 4.50, the mass of 1 000 seed ranged from 30.639 g to 47.415 g, the seed length and width varied from 4.314~4.926 mm and 3.244~3.693 mm, respectively, and the ratios of seed length to width ranged from 1.306 to 1.383. The analysis of variance showed that except the ratios of seed length to width, there were significant differences in the number of seed per pod, the mass of 1 000 seed, the seed length and width among provenances; 2) the percentage of seed germination changed from 43.16% to 90.03% among six provenances, of which the highest was Sajia provenance and the lowest was Mirui provenance; 3); the difference in the start time of seed germination among six provenances was only one day; the persistent time of seed germination varied from 14 to 23 days and the maximum difference in it among the six provenances was 9 days; the summit of seed germination ranged from 17 to 27 days, and it was a large difference among provenances, of which the longest was Sajia provenance and the shortest was Langxian provenance; 4) with increasing altitude, the number of seed per pod significantly declined (R=-0.844 3, PR=0.614 3, PR=-0.883 6, PR=0.804 7, P<0.05).
-
[1] 中国科学院青藏高原综合科学考察队.西藏植物志[M].北京: 科学出版社,1985,2:716-718 [2] 中国科学院中国植物志编辑委员会.中国植物志[M].北京: 科学出版社,1994,40:77 [3] 赵文智.砂生槐沙生适应性初步研究[J].植物生态学报,1998,22(4): 379-384 [4] 许毓英.西藏砂生槐种子营养成份的初步研究[J].自然资源学报,1992,7(4):379-382 [5] 李玉祥.西藏砂生槐的生物学特性及综合利用[J].自然资源学报,1993,8(5):75-79 [6] 王为义.沙生槐抗旱性状的观察[J].植物学报,1980,22(3): 293-294 [7] 陈怀顺,刘志民.砂生槐种群特点及其在河谷植被中的作用[J].资源生态环境网络研究动态,1997,8(3): 18-22 [8] 彭跃明.西藏雅鲁藏布江中部流域砂生槐固沙作用研究[J].林业科技,1997,22(6): 6-8 [9] 赵文智,刘志民.西藏特有灌木砂生槐繁殖生长对海拔和沙埋的响应[J].生态学报,2002,22(1): 134-138 [10] 杨兆平,沈渭寿,孙 明,等.雅鲁藏布江中游河谷风沙化土地砂生槐群落结构特征[J].应用生态学报,2011,22(5):1121-1126 [11] 沈渭寿,李海东,林乃峰,等.雅鲁藏布江高寒河谷流动沙地适生植物种筛选和恢复效果[J].生态学报,2012,32(17):5609-5618 [12] 马兴铭,李红玉,王 波,等.西藏砂生槐生物碱抑菌及杀虫活性的测定[J].中国生物防治,2005,21(3): 183-186 [13] 马兴铭,李红玉,尹少甫,等.砂生槐种子生物碱杀灭原头蚴及抗炎作用[J].中国寄生虫病防治杂志,2004,17 (4):217-219 [14] 马兴铭,李红玉,尹少甫,等.藏药砂生槐子生物碱抗炎抑菌活性的研究[J].中医药学报,2004b,32(5): 23-26 [15] 马兴铭,李红玉,尹少甫,等.西藏砂生槐生物碱抑菌抑瘤的实验研究[J].兰州大学学报:自然科学版,2003,39(6): 74-77 [16] 林少敏.西藏砂生槐[J].草业科学,2002,19(3): 34 [17] 刘志民,赵文智,李志刚. 西藏雅鲁藏布江中游河谷砂生槐种群种子库特征[J].生态学报,2002,22(5):715-722 [18] Liu Z M. Genetic diversity,population structure,and conservation of Sophora moorcroftiana (Fabaceae),a shrub endemic to the Tibetan Plateau[J]. Plant Biology,2006,8(1):81-92 [19] 郭其强,罗大庆,方江平,等.西藏砂生槐的研究现状及其利用与保护对策[J].西北林学院学报,2009,24(1): 98-101 [20] 郭其强,方江平,边 多,等.不同干扰形式对砂生槐群落结构特征的影响[J].西北植物学报,2009,29(8):1670-1677 [21] 刘桂丰,杨传平,刘 关,等.白桦不同种源种子形态特征及发芽率[J].东北林业大学学报,1999,27(4):1-3 [22] 王 超,李旭新,路丙社,等.不同种源黄连木种子萌发特性比较研究[J].河北林果研究,2010,25(1):26-29 [23] 刘生龙,高志海,崔建国,等.唐古特白刺种源试验[J].西北植物学报,1997,17(6):115-118 [24] 武 冲,仲崇禄,牟振强,等.模拟水分胁迫对不同种源麻楝种子萌发能力的影响[J].西北植物学报,2012,32(4):774-780 [25] 林少敏.西藏砂生槐种子萌发特性研究[J].草业科学,2002,19(5):30-32 [26] 王文娟,贺达汉,唐小琴,等.不同温度和沙埋深度对砂生槐种子萌发及幼苗生长的影响[J].中国沙漠,2011,31(6):1437-1442 [27] 臧建成,辛福梅.砂生槐种实害虫对砂生槐种子与萌发的影响[J].西北农业学报,2012,21(2):198-201 [28] 王桔红,崔现亮,陈学林,等. 中、旱生植物萌发特性及其与种子大小关系的比较[J].植物生态学报,2007,31(6):1037-1045 [29] 王一峰,李 岩,代建霄,等.青藏高原东缘风毛菊属5种10个居群植物种子的萌发特性研究[J].西北师范大学学报:自然科学版,2009,45(3):87-92 [30] Vera M L. Effects of altitude and seed mass on germination and seedling survival of heathland plants in north Spain[J]. Plant Ecology,1997,133:101-106
计量
- 文章访问数: 3018
- HTML全文浏览量: 180
- PDF下载量: 1229
- 被引次数: 0