摘要
研究白木香种子发育进程中种子性状、萌发能力和脱水耐性的变化,以及不同光温条件对种子萌发的影响和种子的贮藏特性。结果表明:白木香种子在花后78d获得最大干重,进入生理成熟期,此时萌发率接近最大值;胚在花后57～85d,脱水耐性逐渐增强,并在花后85d获得最大脱水耐性。种子萌发的适宜温度范围为25℃～35℃,光照对种子萌发有一定的抑制作用。新鲜白木香种子(含水量27.45%)在4℃低温条件下贮藏1个月后萌发率仅为30%左右,而含水量7.38%的干燥种子在4℃低温条件下贮藏120d,萌发率仍有53.33%,因此,4℃低温和适度脱水有利于种子短期贮藏。白木香种子能忍耐一定程度的脱水,但干燥至含水量7.50%以下时种子会发生损伤,因此推测白木香种子是一种中间性种子。
The seed traits, germinability and desiccation tolerance at different developing periods of Aquilaria sinen- sis seeds were studied in the present paper, the seed storage characteristics and effects of light and temperature on seed germination were investigated too. The results indicated that A. sinensis seeds reached the physiological matura- tion and got the maximum dr^-weight at 78 d after anthesis, and seed germination percentage reached a peak at this period. Desiccation tolerance of embryos increased gradually from 57 to 85 days after anthesis and reached the maxi- mum at 85 d after anthesis. The optimal germination temperature was 25℃ to 35℃ and seed germination was inhibi- ted by light in a certain degree. The germination percentage of A. sinensis seeds was only about 30% after stored in 4℃ for 30 d when seed moisture content is 27.45%. However, the germination percentage was 53.33% after stored in 4℃ for 120 d when dehydrated to the moisture content of 7.38%. Consequently, low temperature and reasonable dehydration were more suitable for seed short-time storage. A. sineyrsis seeds could suffer dehydration in a certain degree, but the seed will damaged when dehydrated to the moisture content of 7.50%. Thus, A. sinensis seeds exhibi- ted intermediate seed storage behavior.
出处
《植物分类与资源学报》
CAS
CSCD
北大核心
2011年第4期458-464,共7页
Plant Diversity
基金
云南省科技计划项目(2008IF018)
关键词
白木香
种子发育
脱水耐性
种子萌发
贮藏特性
Aquilaria sinensis
Seed development
Desiccation tolerance
Seed germination
Storage Characteristics
