摘要
无籽瓯柑Citrus suavissima‘Seedless’是浙江省新选育的柑橘良种。从花粉的角度对无籽瓯柑、普通瓯柑Citrus suavissima,处红柚Citrus grandis‘Chuhong’和翡翠柚的Citrus grandis的花粉进行了花粉形态观测、花粉量测定、花粉生活力测定及花粉发芽试验等比较研究,试图探索无籽瓯柑无籽的原因。结果表明,4个品种的花药数相近,但无籽瓯柑的花药上罕见自然散发的花粉;无籽瓯柑和普通瓯柑的花粉量接近,两者无明显差异;翡翠柚的花粉量是4个品种中数量最多的,大约是瓯柑的4倍和处红柚的2倍;普通瓯柑花粉的生活力与翡翠柚和处红柚的花粉生活力相当,无籽瓯柑花粉的生活力略低;无籽瓯柑在培养基上不发芽,而普通瓯柑、处红柚和翡翠柚的花粉发芽率在蔗糖质量分数为100 g.kg-1和150 g.kg-1的培养基上接近。无籽瓯柑无籽是因为其花药上罕有自然散发的花粉以及花粉难发芽造成的。
Citrus suavissima ‘Seedless’ is a superior, newly selected and bred variety. Pollens of such varieties as Citrus suavissima ‘Seedless’, Citrus suavissima, Citrus grandis ‘Chuhong’, Citrus grandis were examined in terms of morphology, quantity, viability and germination percentage in order to explore the reason behind the seedlessness of Citrus suavissima ‘Seedless’. The results showed that these four varieties were similar to one another in the number of anthers, but naturally released pollens were rarely seen on the anthers of Citrus suavissima ‘Seedless’ ; in quantity of pollens, there was no obvious difference between Citrus suavissima ‘ Seedless’ and Citrus suavissima, but Citrus grandis had 4 times as many pollens as Citrus suavissima and twice as many pollens as Citrus grandis ‘Chuhong’, Citrus suavissima , Citrus grandis ‘Chuhong’, and Citrus grandis were similar in pollen viabillity, while Citrus suavissima ‘Seedless’ had a pollen viability a little bit lower than other 3 varieties; and Citrus suavissima ‘Seedless’ had no germinated pollen in all the media tested, but other 3 varieties had a similar percentage of germinated pollens in the media with 100 g· kg^- 1 and 150 g· kg^-1 of sucrose in them. It is concluded that rare naturally released pollens and difficulty in pollen germination were responsible for seedlessness of Citrus suavissima ‘Seedless’ [Ch, 1 fig. 3 tab. 13 ref. ]
出处
《浙江林学院学报》
CAS
CSCD
北大核心
2005年第4期359-362,共4页
Journal of Zhejiang Forestry College
基金
浙江省科学技术厅重点项目(2003C20002)
关键词
园艺学
无籽瓯柑
花粉生活力
花粉发芽率
horticulture
Citrus suavissima ‘Seedless’
pollen viability
percentage of pollen germination
