干旱胁迫下 20个茶花品种的抗旱能力比较

comparison of Drought Resistance of 20camellia japonica cultivars under Drought stress

摘要:

为选育出湖北省兼具观赏性和抗旱性的茶花品种 , 以适宜华中地区栽植且观赏性较强的 20个茶花品种 2 a生扦 插苗为研究对象 , 在塑料大棚室温 15~25℃下 , 通过盆栽控水法进行干旱胁迫试验 , 对表形、叶片气体交换参数及相关生 理指标变化进行跟踪分析 , 研究茶花的抗旱性能、干旱条件下理化特性变化 , 进行品种间抗旱能力比较排序。 试验结果表 明 :不同茶花品种对于干旱环境下的耐受度有显著差异 , 严重干旱对各项生理指标、光合指标产生影响 , 抑制植株生长。 在 20个茶花品种中 , 6十八学士》和 6黑骑士》抗旱能力最强 , 6情人节》和 6休斯富豪》最弱。

Abstract:

In order to select camellia japonica cultivars both ornamental and drought resistance in Hubei province , 20C. japonica cultivars with strong ornamental quality were selected as the research objects , and drought stress tests were car- ried out by pot water control method at room temperature 15~25℃ in plastic greenhouse . The phenotypes , leaFgas ex- change parameters and related physiological indexes were Followed. The drought-resistance and physicochemical character- istics oFcamellia camellia under drought conditions were studied , and the drought-resistance oFcamellia C. japonica culti- vars was compared and ranKed. The results showed that there were signiFicant diFFerences in the tolerance oFC. japonica cultivars to drought conditions . severe drought inhibited plant growth by aFFecting physiological and photosynthetic inde- xes . OFthe 20C. japonica cultivars , 6shiba xueshi》and 6Night Rider》were the most drought-resistant , while 6valentine Day》and 6Elsie Hughes》were the least resistant.