本文研究不同播种时间对海滨猫尾木种子萌发的影响，以及淹水、盐度、低温条件对其实生苗生长的影响。结果表明，海滨猫尾木种子千粒重为52 g，种子密度0.021 g·cm-3，种子首次出芽时间在9～16 d不等，发芽率和发芽势随着播种时间推移逐渐降低。水淹至根颈对幼苗生长影响不显著，完全水淹22 d后幼苗开始死亡。幼苗耐受盐分浓度为10 g·kg-1，盐分浓度超过10 g·kg-1不利于幼苗正常生长，盐分浓度超过18 g·kg-1幼苗叶片开始卷曲、脱落。3 ℃低温胁迫对幼苗正常生长有不利影响，0 ℃会导致幼苗呈现半致死状态。海滨猫尾木种子适宜随采随播，幼苗具有较强的耐水淹特性，适生盐度范围广，不耐低温。
关键词：
海滨猫尾木; 育苗; 水淹; 盐度; 低温; 胁迫
The seeds of Dolichandrone spathacea were tested with different sowing time, and the growth of seedlings under different flooding, salinity and low temperature conditions was also studied. Results showed that 1000-grain weight of D. spathacea seed was 52 g, seed density was 0.021 g·cm-3, and seed germination time was 9—16 d. The germination rate and germination potential gradually decreased with planting time. Effect of flooding below the crown on seedling growth was not significant. After flooding 22 d, the seedlings began to die. The salt tolerance of seedlings was 10 g·kg-1, and the salt concentration above 10 g·kg-1 would not be conducive to normal growth of seedlings. Leaves of seedlings with salinity over 18 g·kg-1 began to curl and fall off. Low temperature stress at 3 ℃ began to affect the normal growth of seedlings, and 0 ℃ caused the seedlings to be semi-lethal. The seeds of D. spathacea were suitable for sowed soon after collecting. The seedling had higher flooding tolerance and higher salt tolerance, but was sensitive to low temperature.
[1] 胡启明,李泽贤,邢福武. 红树林植物海滨猫尾木在我国首次发现[J]. 广西植物, 1987(4): 19—20.
[2] 田广红,李玫,杨雄邦,廖宝文,刘文辉,雷振胜. 珠海淇澳岛海滨猫尾木的引种栽培研究[J]. 安徽农业科学, 2011,39(16): 9618—9619.
[3] Mahesh G, Patil K H. Dynamics of seedling distribution of Dolichandrone spathacea (L. f.) K. Schum.[C]//A Proceeding of National Conference on Recent Advances in Physics and Natural Sciences. Maharashtra, India: Karmaveer Bhaurao Patil College, Urun-Islampur, 2018: 94—98.
[4] Saiful A J, Mastura M, Mazurah M I, Nuziah H. Inhibitory potential against methicillin-resistant Staphylococcus aureus (MRSA) of Dolichandrone spathacea, a mangrove tree species of Malaysia[J]. Latin American Journal of Pharmacy, 2011,30(2): 359—362.
[5] 王文卿,陈琼. 南方滨海耐盐植物资源(一)[M]. 厦门: 厦门大学出版社, 2013.
[6] 游惠明. 秋茄幼苗对盐度、淹水环境的生长适应[J]. 应用生态学报, 2015,26(3): 675—680.
[7] 陈鹭真,林鹏,王文卿. 红树植物淹水胁迫响应研究进展[J]. 生态学报, 2006,26(2): 586—593.
[8] 陈新建,陈占宽,刘国顺,刘鸿先. 植物对水分胁迫响应的分子机制与抗逆基因工程的研究进展[J]. 热带亚热带植物学报, 2000,8(1): 81—90.
[9] 茹巧美,郑海雷,肖强. 红树植物耐盐机理研究进展[J]. 云南植物研究, 2006,28(1): 78—84.
[10] 王康君,樊继伟,陈凤,李强,孙中伟,郭明明,张广旭,郑国良. 植物对盐胁迫的响应及耐盐调控的研究进展[J]. 江西农业学报, 2018,30(12): 31—40.
[11] 林艳,郭伟珍,徐振华,贾宗锴. 大叶女贞抗寒性及冬季叶片相对电导率变化研究[J]. 天津农业科学, 2012,18(5): 145—149.
[12] 李焕勇,杨秀艳,唐晓倩,张华新. 植物响应盐胁迫组学研究进展[J]. 西北植物学报, 2016,36(12): 2548—2557.
[13] 杨晓慧,蒋卫杰,魏珉,余宏军. 植物对盐胁迫的反应及其抗盐机理研究进展[J]. 山东农业大学学报(自然科学版), 2006,37(2): 302—305.
[14] 利容千. 植物逆境细胞及生理学[M]. 武汉: 武汉大学出版社, 2002: 1—467.
[15] 耿兴敏. 植物逆境交叉胁迫适应性研究进展[J]. 林业工程学报, 2014,28(4): 14—18.
[16] 岳海,李国华,李国伟,陈丽兰,孔广红. 澳洲坚果不同品种耐寒特性的研究[J]. 园艺学报, 2010,37(1): 31—38.
[17] 陈鹭真,郑文教,杨盛昌,王文卿,张宜辉. 红树林耐寒性和向海性生态系列对气候变化响应的研究进展[J]. 厦门大学学报(自然科学版), 2017,56(3): 305—313.
闽公网安备 35020602000789号