摘要
刺木蓼(Atraphaxis spinosa)和长枝木蓼(A. virgata)为蓼科木蓼属灌木,是乌鲁木齐周边植被组成的重要种。这两种木蓼种子成熟后不萌发,处于休眠状态,对其种子进行5℃(黑暗)和野外低温层积处理,结果表明:5℃层积处理能明显提高两种木蓼种子在15/6、20/10、25/15和30/20℃(昼12 h/夜12 h)的萌发率。野外层积处理显著提高了种子在15/6℃的萌发率。刺木蓼和长枝木蓼的种子均为非深度生理休眠,分别经8、6周的低温层积处理后种子休眠得以解除。刺木蓼种子的休眠程度比长枝木蓼深,休眠解除后,种子萌发所需的最低温度降低。这两种木蓼种子经过冬天的低温层积,可以在春天较低的生境温度下萌发。
Atraphaxis spinosa and A.virgata are native shrubs in Urumqi.The two species are important for the desert ecosystem.Seeds of the species were dormant at maturity.Dormancy break occurred during cold stratification at 5℃ for 8 weeks and 6 weeks,also at the habitat in winter.Seeds stratified at 5℃ and habitat and incubated at 12/12 h daily temperature regimes of 15/6,20/10,25/15 and 30/20℃ geminated faster and to a significantly higher percentage at each temperature regime than those not stratified.Seeds of A.spinosa were more deeper dormant than A.virgata.Their seeds were shallow non-deep physiological dormancy.
出处
《植物研究》
CAS
CSCD
北大核心
2010年第5期600-603,共4页
Bulletin of Botanical Research
基金
新疆维吾尔自治区高校科研计划重点项目(XJEDU2007S26)
国家自然科学基金资助项目(3066003530960086)
关键词
刺木蓼
长枝木蓼
种子休眠
萌发
低温层积
萌发物候
Atraphaxis spinosa
A. virgata
seed dormancy
germination
cold stratification
germination phenology
