摘要
为探讨梨果萼片宿存、脱落与矿质营养之间的关系,以砀山酥梨为试材,在盛花后5～25 d,测定了宿萼幼果及其萼片中9种矿质元素含量,分析了幼果与萼片发育过程中对各种矿质元素的需求;通过盛花期喷施GA3、PP333、FeSO4处理,探讨了Fe在果实萼片发育中的作用,并对幼果萼片中矿质元素与叶绿素含量进行了相关性分析。结果表明,砀山酥梨宿萼幼果与萼片中Fe含量差异最大,萼片中Fe平均含量是幼果的6.13倍,其它元素差异较小;萼片发育过程中对铁的需求量明显高于幼果,而对其他矿质元素的需求量则少于幼果。400 mg·L-1GA3处理增加了宿萼果率,且增加了幼果与萼片Fe的含量;2 500 mg·L-1PP333处理降低了宿萼果率,且减少了幼果与萼片中Fe的含量,喷施0.3%FeSO4提高了宿萼果率。因此,Fe是萼片发育重要的矿质元素之一,Fe充足时果实萼片易宿存。同时,萼片中叶绿素a含量的动态变化与Fe含量的动态变化呈显著性正相关,表明萼片中大量的Fe可能用于叶绿素a的合成。
To discuss the relationship between mineral nutrient and pear fruit calyx persistency or shedding, the pear cultivar ‘Dangshan Suli＇ was used as experiment materials, and the mineral elements contents in fruitlet and its calyx were tested during 5 d to 25 d after full bloom, the demand on different mineral elements for the young fruit and sepals growth were studied. The effect of Fe to fruit sepal＇s growth was discussed by spraying of GA3, PP333 and FeSO4 at the full bloom stage. The correlation analysis was carried out in mineral and chlorophyll contents in fruitlet sepals. The results showed that the Fe content difference between in fruitlet and in its calyx whose Fe content was 6.13 times higher than that in fruiflet was the biggest among the tested nine mineral elements. During the sepal developing process, the iron demands were obviously higher than the fruitlets but at the same time of less demands for other mineral elements. The percentage of calyx persistency fruit, Fe content in fruitlet and its calyx were all increased under the spraying of 400 mg . L-1 GA3. On the contrary, the percentage of calyx persistencyfruit and the Fe content were decreased under the treatment of 2 500 mg .L^-1 PP333, otherwisely, the calyx persistency fruit percentage was increased after spraying 0.3% FeSO4 solution too. So it was postulated that the sufficient Fe content was the guarantees to both fruit calyx development and the fruit calyx persistency. There was a positive correlation between Fe and Chl.a content dynamic changes in fruitlet calyx, it indicated that the abundant of Fe was probably used for Chl.a synthesis.
出处
《园艺学报》
CAS
CSCD
北大核心
2012年第1期159-167,共9页
Acta Horticulturae Sinica
基金
国家现代农业(梨)产业技术体系建设资金资助项目(CARS-29)
关键词
梨
萼片
发育
F0
pear
calyx
development
Fe
