Effects of boron on leaf expansion and intercellular airspaces in mung bean in solution culture

文献类型： 外文期刊

第一作者： Jiao, XY

作者： Jiao, XY;Zhu, YG;Jarvis, BC;Quick, WP;Christie, P

作者机构：

关键词： B deficiency;B sufficiency;intercellular airspaces;leaf expansion;Phaseolus aureus

期刊名称：JOURNAL OF PLANT NUTRITION （ 影响因子：1.707； 五年影响因子：1.645 ）

ISSN： 0190-4167

年卷期： 2005 年 28 卷 2 期

页码：

收录情况： SCI

摘要： Mung bean (Phaseolus aureus Roxb.) was grown in solution culture to study the effect of boron (B) deficiency on leaf expansion and intercellular airspaces. Different B concentrations were supplied just after initiation of the second trifoliate leaf because this is the first leaf whose growth depends on the exogenous B supply. The central leaflet of the second trifoliate was employed in this study. When plants were grown in 0.2 mumol L(-1) B, leaf expansion was limited compared with that of plants supplied with 50 mumol L(-1) B. During the progress of leaf development, plants grown in 0.2 mumol L(-1) B were transferred to medium with 50 mumol L(-1) B medium at days 2, 4, 6, and 8. The final leaf area of plants transferred on day 2 was half that of plants raised in 50 mumol L(-1) B solution. Plants transferred on days 6 and 8 produced a leaf area similar to that of plants grown in 0.2 mumol L(-1) B. Uptake experiments with (10)B-enriched boric acid showed that there was enough B present at the sites of cell expansion after 50 mumol L(-1) B was supplied for two days. The failure of deficient leaves to resume elongation may therefore have been due either to a lack of incorporation of B into the cell wall or boron or to a requirement for B early in leaf development to enable future cell wall expansion. In addition to the reduced leaf expansion resulting from B deficiency, the formation of intercellular airspaces was also depressed. The proportion of the spongy mesophyll region comprising airspaces in B-deficient leaves was less than 50% of that observed in leaves of plants supplied with sufficient B.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序