《植物生理学报》 2015, 51(10): 1604-1610

不同甜高粱品种萌发期抗盐和抗旱性比较

杨帆, 魏晓岑, 张士超, 王宝山^*

山东师范大学生命科学学院, 逆境植物山东省重点实验室, 济南250014

通信作者：王宝山；E-mail: bswang@sdnu.edu.cn；Tel: 0531-8618 0197

摘　要：

选用‘凯勒’等10个品种甜高粱种子为材料, 分别用NaCl和等渗的甘露醇进行处理, 以鉴定各品种的抗盐性与抗旱性。结果表明: 不同品种甜高粱种子在100 mmol•L^-1 NaCl和等渗的甘露醇处理下萌发和幼苗生长都受到了不同程度的抑制; 对比盐处理组和干旱处理组, 绝大多数品种的甜高粱种子的萌发参数和幼苗生长指标都没有显著性的差异, 这说明盐胁迫抑制种子萌发的主要因素是由渗透胁迫造成的生理干旱; 利用隶属函数值法对甜高粱在萌发期的7个生长生理指标进行综合评价, 抗盐性强弱顺序为‘绿能1号’>‘济甜杂7号’>‘济甜杂10号’>‘济甜杂2号’>‘济甜杂11-6’>‘MN-3867’>‘能饲1号’>‘凯勒’>‘MN-94’>‘济甜杂12号’, 抗旱性强弱顺序为‘绿能1号’>‘济甜杂2号’>‘济甜杂11-6’>‘济甜杂10号’>‘济甜杂7号’>‘MN-3867’>‘MN-94’>‘能饲1号’>‘济甜杂12号’>‘凯勒’, 可以看出甜高粱在萌发期的抗盐性与抗旱性存在较强的正相关关系。

关键词：甜高粱; 抗盐性; 抗旱性; 萌发

收稿：2015-07-01   修定：2015-09-06

资助：国家科技支撑计划课题(2009BADA7B05)、山东省自然科学基金重点项目(ZR2014CZ002)、教育部博士点基金优先发展领域(20123704130001)和山东省高等学校科技计划(J15LE08)。

Comparison on Salt and Drought Resistances of Different Varieties of Sorghum bicolor at Germination Stage

YANG Fan, WEI Xiao-Cen, ZHANG Shi-Chao, WANG Bao-Shan^*

Shandong Provincial Key Laboratory of Plant Stress Research, College of Life Science, Shandong Normal University, Jinan 25001⁴, China

Corresponding author: WANG Bao-Shan; E-mail: bswang@sdnu.edu.cn; Tel: 0531-8618 0197

Abstract:

Ten Sorghum bicolor varieties including ‘Keller’ were treated by NaCl and isosmotic mannitol solution to evaluate their salt and drought resistances at germination stage. The results show that the germination and seedlings growth of different varieties of S. bicolor in 100 mmol•L^-1 NaCl and isosmotic mannitol solution were restrained in different extents. The germination parameters and seedlings growth indicators of most varieties of S. bicolor were not significantly different by comparison of salt and drought treatment, which suggests that the main factors inhibiting seed germination was physiological drought caused by osmotic stress. Comprehensive evaluation of salt and drought tolerances of S. bicolor varieties at germination stage was conducted using subordinate function value method. The results show that salt resistance of 10 varieties of S. bicolor sorting from strong to weak is ‘Lüneng 1’>‘Jitianza 7’>‘Jitianza 10’>‘Jitianza 2’>‘Jitianza 11-6’>‘MN-3867’>‘Nengsi 1’>‘Keller’>‘MN-9⁴’> ‘Jitianza 12’ at the germination stage , and drought resistance is in the order of ‘Lüneng 1’>‘Jitianza 2’>‘Jitianza 11-6’>‘Jitianza 10’>‘Jitianza 7’>‘MN-3867’>‘MN-9⁴’>‘Nengsi 1’> ‘Jitianza 12’>‘Keller’. Therefore, there was a strong positive correlation between salt resistance and drought resistance of S. bicolor genotypes at germination stage.

Key words: Sorghum bicolor; salt resistance; drought resistance; germination