摘要
以‘纽荷尔’脐橙为材料,连续两年研究了缺硼和正常(对照)叶片总硼和不同形态硼含量的动态变化。结果显示:1)在果实膨大期(花后120～160 d),越冬老叶和春梢新叶的总硼含量均有一个显著下降的过程,且大部分时间里缺硼处理的比对照硼含量低;2)缺硼树越冬老叶的自由态硼和半束缚态硼含量在果实膨大期很低,对照较高;缺硼树越冬老叶在花后120～160 d束缚态硼含量较低,相对含量较高;3)缺硼和对照树春梢新叶的自由态硼和半束缚态硼含量比越冬老叶高,束缚态硼含量较越冬老叶低;缺硼树叶片的3种形态硼含量在花后140～160 d显著低于对照,且束缚态硼相对含量较高。就‘纽荷尔’脐橙叶片不同形态硼的动态与缺硼的生理机制进行了讨论。
Changes in contents of boron（B）in different forms in the leaves of Newhall navel orange （Citrus sinensis Osbeck）were investigated during fruit development in the south part of Jiangxi Province. The Newhall orange trees were either grown in low boron soil, where conspicuous symptom of B deficiency was found in mature leaves, or grown soil with adequate boron, serving as the control. The results showed that： （Ⅰ）content of total B decreased significantly either in old leaves from last season or in spring-flush leaves from current year during fruit enlargement period from 120 to 160 days after full bloom（DAFB）,and the content in Newhall（B deficiency, BD）were generally lower than in the control.（Ⅱ）In old leaves, content of free B and semi-bound B in BD Newhall were very low from 120 to 160 DAFB, in contrast, those in the control were quite high during this period; Compared to free B and semi-bound B, bound B content in BD Newhall were likewise lower than the control during the same period, whereas its relative contents were higher in the former;（Ⅲ）In spring-flush leaves, free B and semi-bound B content were higher than in old leaves, bound B content were lower; Furthermore, compared to the control, content of three B forms in BD Newhall were significantly low from 140 to 160 DAFB. However, the relative contents of bound B were comparatively higher in Newhall（BD）.The dynamics of three B forms and physiological mechanism of B deficiency occurfence in Newhall navel orange leaves is also discussed.
出处
《园艺学报》
CAS
CSCD
北大核心
2007年第5期1103-1110,共8页
Acta Horticulturae Sinica
基金
国家自然科学基金项目(30471202)
教育部优秀团队项目(IRI0458)
关键词
柑橘
硼素营养
缺硼病
生理机制
Citrus sineusis Osbeck
Navel orange
Boron nutrition
Boron deficiency
Physiological mechanism
