Boron toxicity in sunflower
Boron toxicity in sunflower
复制标题
向日葵中的硼毒性
DOI：
10.1007/978-94-011-5564-9_28
复制
发表时间：
1997
期刊：
影响因子：
--
通讯作者：
D. Edwards
中科院分区：
文献类型：
--
作者：
F. Blamey;C. J. Asher;D. Edwards
据推测，硼（B）缺乏和植物毒性之间的供应范围很窄。通过两个水培试验研究了向日葵（Helianthus annuusL.）CV. Hysun 31到潜在缺陷和潜在毒性的B供应。随着B供应量的增加，46天龄植物最年轻的成熟叶片（YMB）中的B浓度线性增加，最高可达1870 mg kg-1干重。当YMB中的B从22 mg kg-1干重增加到290 mg kg-1干重时，植物干重增加了5倍。确定YMB中B毒性的临界浓度（最大产量的90%）为1130 mg kg-1。当施硼量为1870 mg B kg-1时，YMB的干物质产量仅下降25%。本研究结果表明，向日葵在B缺乏和毒性之间并不存在一个狭窄的供应范围，并且该物种对叶片组织中的高B浓度具有耐受性。
It has been hypothesised that there is a narrow range of supply between boron (B) deficiency and toxicity in plants. Two solution culture experiments were conducted to study the response of sunflower (Helianthus annuusL.) cv. Hysun 31 to potentially-deficient and potentially-toxic supplies of B. The concentration of B in the youngest mature leaf blade (YMB) of 46-day-old plants increased linearly up to a maximum of 1870 mg kg-1dry wt in response to increasing B supply. There was a five-fold increase in plant dry mass as B in the YMB increased from 22 to 290 mg kg-1dry wt. The critical concentration for B toxicity (90% of maximum yield) was determined as 1130 mg kg-1in the YMB. Dry matter yield declined by only 25% with 1870 mg B kg-1in the YMB. Results of this study indicated that there is not a narrow range of supply between B deficiency and toxicity in sunflower, and that this species is tolerant of high B concentration in leaf tissue.