Factors affecting germination of hairy nightshade (Solanum sarrachoides) seeds
Factors affecting germination of hairy nightshade (Solanum sarrachoides) seeds
复制标题
DOI：
10.1614/ws-04-100r1
复制
发表时间：
2005-02
期刊：
影响因子：
--
通讯作者：
Jingkai Zhou;E. Deckard;W. Ahrens
中科院分区：
文献类型：
--
作者：
Jingkai Zhou;E. Deckard;W. Ahrens
摘要龙葵是北美分布最广的茄属植物。毛龙葵发芽生物学知识的增加，将促进最佳控制程序的发展。在温室和环境控制生长箱条件下，研究了环境和化学因子对龙葵种子萌发的影响。毛龙葵种子是在一个天生的休眠状态时，最初从浆果分离。在4 ℃下，湿藏比干藏对打破休眠更有效，但在17 ℃下干藏更有效。毛龙葵种子发芽同样好下14小时的光周期和连续黑暗。这些种子在19 - 39 ℃的恒温条件下发芽，最佳发芽温度为27 - 33 ℃.萌发率随萌发介质渗透势的降低而显著下降。毛龙葵种子萌发的最适pH范围为6和8之间，虽然有些种子在pH 4和9发芽。毛龙葵在播种深度为2cm或以下时出苗最多，播种深度为8cm时不出苗。学名：Hairy nightshade，Solanum sarrachoides Sendtner SOLSA。
Abstract Hairy nightshade is the most widespread nightshade species in North America. Increased knowledge of hairy nightshade germination biology would facilitate development of an optimum control program. Germination of hairy nightshade seeds as affected by environmental and chemical factors was studied under greenhouse and controlled-environment growth chamber conditions. Hairy nightshade seeds were in an innate dormant state when initially separated from the berries. Moist compared with dry storage was more effective for breaking dormancy at 4 C, but dry storage was more effective at 17 C. Hairy nightshade seeds germinated equally well under both a 14-h photoperiod and continuous darkness. These germinated at constant temperatures ranging from 19 to 39 C, with optimum germination attained between 27 and 33 C. Germination markedly declined as osmotic potential of the germination medium decreased. The optimum pH range for germination of hairy nightshade seeds was between 6 and 8, although some seeds germinated at pH 4 and 9. Maximum hairy nightshade emergence occurred with seeding depths of 2 cm or less. No emergence occurred when seeding depth reached 8 cm. Nomenclature: Hairy nightshade, Solanum sarrachoides Sendtner SOLSA.