关键词:棉花(Gossypium hirsutum L.); 花铃期; 渍水; 叶片蔗糖代谢; 铃重 Effects of Waterlogging on Sucrose Metabolism of the Subtending Leaf of Cotton Boll and Boll Weight during Flowering and Boll-forming Stage YANG Chang-Qin1,2, LIU Rui-Xian2, ZHANG Guo-Wei2, XU Li-Hua2, ZHOU Zhi-Guo1,* 1Key Laboratory of Crop Physiology & Ecology in Southern China, Ministry of Agriculture / College of Agriculture, Nanjing Agricultural University, Nanjing 210095, China
2Institute of Industrial Crops, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
Fund: AbstractTwo year experiments were conducted at experimental station of Jiangsu Academy of Agricultural Sciences of Nanjing City with waterlogging treatments for seven days and fourteen days in pools with rainproof shelter at anthesis of the 6th or 8th fruiting branches of cotton NuCOTN 33B, taking well water conditions as control. The results showed that contents of soluble sugar, sucrose and starch of subtending leaves of bolls increased and the ratio of sucrose content to starch content decreased under waterlogging as compared with control and the increase ranges rised with lasting waterlogging duration, indicating that the sucrose exportation of subtending leaves was inhibited and became worse with lasting waterlogging duration. The activities of sucrose phosphate synthase (SPS), sucrose synthase (SS), and acid invertase (AI) increased and got higher with the rise in fruit branch position and waterlogging duration. The contents of soluble sugar, sucrose and starch were positively and significantly correlated with activities of SPS, SS, and AI (P<0.05), indicating that the increased activities of SPS, SS, and AI do not facilitate sucrose transiting out. As a result, the boll weight declined under waterlogging with the rise in fruit branch position and waterlogging duration. Therefore, the increased enzyme activity in sucrose metabolism and the impaired sucrose efflux are the main causes of boll weight decrease under waterlogging.
Keyword:Cotton (Gossypium hirsutum L.); Flowering and boll-forming stage; Waterlogging; Leaves sucrose metabolism; Boll weight Show Figures Show Figures
表1 花铃期渍水对棉花铃重的影响(2007年和2009年) Table 1 Effects of waterlogging on boll weight during flowering and boll-forming stage in 2007 and 2009 (g boll-1)
处理 Treatment
2007
2009
LFB
MFB
UFB
LFB
MFB
UFB
对照 Control
5.05 a
5.54 a
4.96 a
5.10 a
5.88 a
5.25 a
渍水7 d Waterlogging 7 days
—
—
—
4.77 b
5.06 b
4.07 b
渍水14 d Waterlogging 14 days
4.27 b
4.66 b
3.68 b
4.45 c
4.83 c
3.57 c
LFB、MFB和UFB分别代表下部、中部和上部果枝。数值后小写字母表示在0.05水平上差异显著。 LFB, MFB, and UFB stand for low fruiting branch, middle fruiting branch and upper fruiting branch, respectively. Values followed by different letters are significantly different at P<0.05.
表1 花铃期渍水对棉花铃重的影响(2007年和2009年) Table 1 Effects of waterlogging on boll weight during flowering and boll-forming stage in 2007 and 2009 (g boll-1)
图1 花铃期渍水对棉铃对位叶碳水化合物含量的影响(2007年和2009年)LFB、MFB和UFB分别代表下部、中部和上部果枝。Fig. 1 Effects of waterlogging on carbohydrate contents of subtending leaves of bolls during flowering and boll-forming stage in 2007 and 2009LFB, MFB, and UFB stand for low fruiting branch, middle fruiting branch, and upper fruiting branch, respectively.
图2 花铃期渍水对棉铃对位叶蔗糖代谢相关酶活性的影响(2007年和2009年)LFB、MFB和UFB分别代表下部、中部和上部果枝。Fig. 2 Effects of waterlogging on sucrose metabolism enzyme activity of subtending leaves of bolls during flowering and boll-forming stage in 2007 and 2009LFB, MFB, and UFB stand for low fruiting branch, middle fruiting branch, and upper fruiting branch, respectively.
表2 棉铃对位叶碳水化合物含量与蔗糖代谢相关酶活性相关关系 Table 2 Relationship between carbohydrate contents and enzyme activities related to sucrose metabolism of subtending leaves of bolls
处理 Treatment
蔗糖磷酸合酶 Sucrose phosphate synthase
蔗糖合酶 Sucrose synthase
酸性转化酶 Acid invertase
可溶性糖 Soluble sugar
对照Control
0.694**
0.240
-0.738**
渍水Waterlogging
0.785**
0.638**
0.459**
蔗糖 Sucrose
对照Control
0.602**
0.350
-0.508**
渍水Waterlogging
0.526**
0.496**
0.368*
淀粉 Starch
对照Control
0.371*
0.320
-0.422*
渍水Waterlogging
0.734**
0.668**
0.444**
*和**分别表示在0.05和0.01水平上显著。* and** mean significant differences at 0.05 and 0.01 probability levels, respectively.
表2 棉铃对位叶碳水化合物含量与蔗糖代谢相关酶活性相关关系 Table 2 Relationship between carbohydrate contents and enzyme activities related to sucrose metabolism of subtending leaves of bolls
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