Manivannan P, Jaleel C Abdul, Sankar B, Kishorekumar A, Somasundaram R, Lakshmanan G M A, Panneerselvam R
Stress Physiology Lab, Department of Botany, Annamalai University, Annamalainagar 608002, Tamilnadu, India.
Colloids Surf B Biointerfaces. 2007 Oct 1;59(2):141-9. doi: 10.1016/j.colsurfb.2007.05.002. Epub 2007 May 6.
In the present investigation, two watering treatments, viz., 100% and 60% field capacity (FC) were used to understand the effects of water deficit on early growth, biomass allocation, pigment and biochemical constituents and proline metabolism of five varieties of Sunflower (Helianthus annuus L.) plants. We found that there was a significant difference in early growth, dry matter accumulation, pigment, biochemical constituents and proline metabolism among the five varieties. The root length, shoot length, total leaf area, fresh and dry weight, chlorophyll a, b, total chlorophyll and carotenoid were significantly reduced under water stress treatments. Water stress increased the proline, free amino acid and glycinebetaine contents along with increased activity of gamma-glutamyl kinase but the activity of proline oxidase reduced as a consequence of water stress.
在本研究中，采用了两种浇水处理方式，即田间持水量的100%和60%，以了解水分亏缺对五个向日葵（Helianthus annuus L.）品种植株早期生长、生物量分配、色素和生化成分以及脯氨酸代谢的影响。我们发现，这五个品种在早期生长、干物质积累、色素、生化成分和脯氨酸代谢方面存在显著差异。在水分胁迫处理下，根长、茎长、总叶面积、鲜重和干重、叶绿素a、b、总叶绿素和类胡萝卜素均显著降低。水分胁迫增加了脯氨酸、游离氨基酸和甘氨酸甜菜碱的含量，同时γ-谷氨酰激酶活性增加，但脯氨酸氧化酶活性因水分胁迫而降低。
