以盆栽胡萝卜品种向阳二号为材料, 研究不同程度水分胁迫及胁迫解除后对胡萝卜生长的影响, 旨在为胡萝卜耐旱栽培提供理论依据。结果表明, 水分胁迫对胡萝卜的生长影响很大, 当缺水严重时, 叶片及根的生长均受到明显抑制, 使苗的生长量、干物质积累及含水量显著下降。而且即使解除胁迫后其生长及各项指标也难以恢复。水分胁迫对叶细胞结构也有很大影响, 随着水分胁迫程度的增强, 细胞核数量减少, 核缩小、变形或降解, 解除胁迫以后也很难恢复。
Xiangyang No.2 potted plant was used to study affecting carrot growth under various degrees of water stress and after freed from water stress. The results showed that canot growth was largely affeded by water stress, when being seriously short of water, the leaves growth and roots growth were distinctly restrained. Seedirg growth amount, dry matter accumulation and water content were effectively decreased. These targets were dffficultly recovered even though removed water stress. Water stress could large affected on cell structure of leaf, with enhanced degree of water stress, the karyon amount decreased, and the nucleolus reduced, distorted or degraded. As were difficultly recovered after removed water stress.
[1] Cui Shi-mao, Sadayoshi K, Ogawa Y, et al. Effects of water stress on sorbitol content in leaves and roots, anatomical changes in cell nuclei, and starch accumulation in leaves of young peach trees[J]. J Japan Soc Hort Sci, 2004, 73(1): 25-30.
[2] 王环, 胡荣海, 昌小平. 水分胁迫下小麦地上和地下部的反应及其抗旱性研究[J]. 西北植物学报, 1996, 16(2): 107-115.
[3] 刘殿英, 黄炳茹, 董庆裕. 土壤水分对冬小麦根系的影响[J]. 山东农业大学学报, 1991, 22(2): 102-110.
[4] Weir A H, Battaclough P B. The effect of drought on root growth of winter and on its water uptake from a deep loam[J]. Soil Use and Managerment, 1986, 2(3): 91-96.
[5] Gerakis P A, Guerrero F P, Williams W A. Growth, water relations and nutrition of three glassland annuals as affected bydrought[J]. J Appl Ecol, 1975, 12: 125-135.
