钙喷雾对芍药（Paeonia lactiflora pall.）花序茎的机械强度和细胞壁组分的影响

Li Chengzhong, Tao Jun, Zhao Daqiu, You Chao, Ge Jintao

College of Horticulture and Plant Protection, Yangzhou University, Yangzhou 225009, China.

Department of Landscape Architecture and Horticulture Yangzhou Vocational College of Environment and Resources, Yangzhou 225127, China.

Int J Mol Sci. 2012;13(4):4704-4713. doi: 10.3390/ijms13044704. Epub 2012 Apr 13.

Calcium is an essential element and imparts significant structural rigidity to the plant cell walls, which provide the main mechanical support to the entire plant. In order to increase the mechanical strength of the inflorescence stems of herbaceous peony, the stems are treated with calcium chloride. The results shows that preharvest sprays with 4% (w/v) calcium chloride three times after bud emergence are the best at strengthening "Da Fugui" peonies' stems. Calcium sprays increased the concentrations of endogenous calcium, total pectin content as well as cell wall fractions in herbaceous peonies stems, and significantly increased the contents of them in the top segment. Correlation analysis showed that the breaking force of the top segment of peonies' stems was positively correlated with the ratio of water insoluble pectin to water soluble pectin (R = 0.673) as well as lignin contents (R = 0.926) after calcium applications.

钙是一种必需元素，能赋予植物细胞壁显著的结构刚性，而植物细胞壁为整个植物提供主要的机械支撑。为了提高芍药花茎的机械强度，对花茎进行氯化钙处理。结果表明，在芽出现后用4%（重量/体积）氯化钙进行三次采前喷雾，对增强“大富贵”芍药的花茎效果最佳。钙喷雾增加了芍药花茎中内源钙的浓度、总果胶含量以及细胞壁组分，并且显著增加了顶部切段中这些物质的含量。相关性分析表明，施用钙后，芍药花茎顶部切段的折断力与水不溶性果胶与水溶性果胶的比例（R = 0.673）以及木质素含量（R = 0.926）呈正相关。