Matsunaga Toshiro, Ishii Tadashi
National Agricultural Research Center, National Agriculture and Food Research Organization, Tsukuba, Ibaraki, Japan.
Anal Sci. 2006 Aug;22(8):1125-7. doi: 10.2116/analsci.22.1125.
Boron (B) is an essential micronutrient for vascular plants. The function of B has been demonstrated to cross-link monomeric rhamnogalacturonan II (mRG-II) to form dimeric RG-II-borate (dRG-II-B), and thus to stabilize plant cell walls. The dRG-II-B to total RG-II ratio in the cell walls of pumpkin hydroponically grown under various low-B conditions was analyzed to evaluate its applicability to the diagnosis of plant B deficiency. The dRG-II-B ratio in cell walls ranged between approximately 0.9 in B-sufficient tissues and approximately 0.15 in severe B-deficient tissues, reflecting the B nutritional status of tissues. This result indicates that the degree of B shortage in plant tissues is very likely to be diagnosed by the dRG-II-B ratio in cell walls.
硼（B）是维管植物必需的微量营养素。已证明硼的功能是使单体鼠李半乳糖醛酸聚糖II（mRG-II）交联形成二聚体RG-II-硼酸盐（dRG-II-B），从而稳定植物细胞壁。分析了在各种低硼条件下水培生长的南瓜细胞壁中dRG-II-B与总RG-II的比率，以评估其在诊断植物硼缺乏症中的适用性。细胞壁中的dRG-II-B比率在硼充足组织中约为0.9，在严重硼缺乏组织中约为0.15，反映了组织的硼营养状况。这一结果表明，很可能通过细胞壁中的dRG-II-B比率来诊断植物组织中硼的短缺程度。
