蔗糖对桃幼苗生长发育及其SnRK1酶活性的影响

doi:10.11983/CBB19032

摘要/Abstract

摘要： 以实生桃(Prunus persica)苗为试材, 探讨SnRK1对不同浓度蔗糖及处理时间的响应特性, 揭示蔗糖对植株生长发育的影响, 以期为果树生产提供理论依据及技术支持。结果表明, 施加5%蔗糖时, 植株体内SnRK1酶活性最高, 且在一定时间内, 酶活性持续升高; 与对照(清水和甘露醇)相比, 5%蔗糖处理显著提高植株可溶性糖、淀粉和叶片叶绿素含量, 增加植株地上部和地下部生物量, 显著加快植株净光合速率; 通过观察根系构型, 发现5%蔗糖可以显著增加根系总表面积、总体积和侧根数量, 并可促进根系加粗加长生长。qRT-PCR分析表明, 外源蔗糖能促进根系中生长素的合成和转运。综上, 一定浓度蔗糖可以提高植株体内SnRK1酶活性, 影响植株碳代谢, 促进植株生长发育, 且增加根系生长素的合成与转运, 进而影响根系构型。

关键词: 桃, SnRK1, 蔗糖, 生长素, 根系构型

Abstract: This study analyzed the SnRK1 activity and seedling growth and development in response to different concentrations and durations of exogenous sucrose in peach (Prunus persica), thus providing theoretical basis and technical support for fruit production. The data showed that 5% sucrose treatment greatly enhanced the SnRK1 activity, which was continuously increased within a certain period of treatment. Compared with water and mannitol controls, 5% sucrose treatment significantly increased the contents of soluble sugar, starch, and chlorophyll, the biomass of aboveground and underground, and the net photosynthetic rate. Examination of root configuration showed that 5% sucrose significantly increased root surface area, root volume, and number of lateral roots, and promoted root thickening and elongation. qRT-PCR analysis showed that exogenous sucrose promoted auxin synthesis and transport in roots. In conclusion, application of certain concentration of sucrose promotes SnRK1 activity, carbon metabolism, and plant growth and development, increases root auxin synthesis and transport and affects root configuration in peach.

Key words: peach, SnRK1, sucrose, auxin, root configuration

张淑辉,王红,王文茹,吴雪莲,肖元松,彭福田. 蔗糖对桃幼苗生长发育及其SnRK1酶活性的影响. 植物学报, 2019, 54(6): 744-752.

Shuhui Zhang,Hong Wang,Wenru Wang,Xuelian Wu,Yuansong Xiao,Futian Peng. Effects of Sucrose on Seedling Growth and Development and SnRK1 Activity in Prunus persica. Chinese Bulletin of Botany, 2019, 54(6): 744-752.

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链接本文: https://www.chinbullbotany.com/CN/10.11983/CBB19032

https://www.chinbullbotany.com/CN/Y2019/V54/I6/744

图/表 10

表1 所用引物

Table 1 Primers used in this study

Gene	Primer name	Primer sequence (5′-3′)
PpPIN1 (Ppa002944m)	P-PIN1-F	TAACAATACGACAGCGCATTACC
PpPIN1 (Ppa002944m)	P-PIN1-R	TGAAGATCCTTACCACCATCCTC
PpPIN2 (Ppa024134m)	P-PIN2-F	TTCGAATCTCACGGGAGTGG
PpPIN2 (Ppa024134m)	P-PIN2-R	GAATCCACCTTGGAAACTGTTTG
PpPIN3 (Ppa002528m)	P-PIN3-F	ATCTAACCTTACAGGCGCAGAGA
PpPIN3 (Ppa002528m)	P-PIN3-R	GAGTCTCTTCGAAATTTGACGGT
PpYUC2 (Ppa022204m)	P-YUC2-F	GACCCAGCAGTGTTCGATCA
PpYUC2 (Ppa022204m)	P-YUC2-R	CTGCCTCCTCCAATTCTGGCT
PpYUC6 (Ppa005244m)	P-YUC6-F	TCCTCCTCATCACCATCACA
PpYUC6 (Ppa005244m)	P-YUC6-R	CCACAAGAGGCTATGCAATT
PpActin	P-Actin-F	GTTATTCTTCATCGGCGTCTTCG
PpActin	P-Actin-R	CTTCACCATTCCAGTTCCATTGTC

图1 不同浓度蔗糖对桃幼苗SnRK1酶活性的影响 S1: 清水; S2: 1%蔗糖溶液; S3: 3%蔗糖溶液; S4: 5%蔗糖溶液; S5: 7%蔗糖溶液。不同小写字母表示处理间差异显著(P<0.05)。

Figure 1 Effects of different sucrose concentrations on SnRK1 activity in peach seedlings S1: Water; S2: 1% sucrose solution; S3: 3% sucrose solution; S4: 5% sucrose solution; S5: 7% sucrose solution. Different lowercase letters above the bars indicate significant differences among different treatmens (P<0.05).

图2 不同蔗糖处理时间对桃幼苗SnRK1酶活性的影响 T1: 清水; T2: 5%蔗糖溶液; T3: 5%甘露醇溶液。不同小写字母表示处理间差异显著(P<0.05)。

Figure 2 Effects of sucrose treatment on SnRK1 activity in peach seedlings T1: Water; T2: 5% sucrose solution; T3: 5% mannitol solution. Different lowercase letters above the bars indicate significant differences among different treatments (P<0.05).

图3 外源蔗糖对桃幼苗叶片(A)和根系(B)可溶性糖含量的影响 T1-T3同图2。不同小写字母表示处理间差异显著(P<0.05)。

Figure 3 Effects of exogenous sucrose on soluble sugar contents in leaves (A) and roots (B) of peach seedlings T1-T3 see Ffddigure 2. Different lowercase letters above the bars indicate significant differences among different treatments (P<0.05).

图4 外源蔗糖对桃幼苗叶片(A)和根系(B)淀粉含量的影响 T1-T3同图2。不同小写字母表示处理间差异显著(P<0.05)。

Figure 4 Effects of exogenous sucrose on starch contents in leaves (A) and roots (B) of peach seedlings T1-T3 see Ffddigure 2. Different lowercase letters above the bars indicate significant differences among different treatments (P<0.05).

图5 外源蔗糖对桃功能叶片叶绿素相对含量(A)和净光合速率(B)的影响 T1-T3同图2. 不同小写字母表示处理间差异显著(P<0.05)。

Figure 5 Effects of exogenous sucrose on relative content of chlorophyll (A) and photosynthetic rate (B) of peach leaves T1-T3 see Ffddigure 2. Different lowercase letters above the bars indicate significant differences among different treatments (P<0.05).

图6 外源蔗糖对桃幼苗鲜重的影响 T1-T3同图2。不同小写字母表示处理间差异显著(P<0.05)。

Figure 6 Effects of exogenous sucrose on fresh weight of peach seedlings T1-T3 see Ffddigure 2. Different lowercase letters above the bars indicate significant differences among different treatments (P<0.05).

表2 外源蔗糖对桃幼苗根系构型的影响

Table 2 Effects of exogenous sucrose on the root architecture of peach seedlings

Experimental treatments	Number of primary lateral roots	Number of secondary lateral roots	Total root length (cm)	Total root surface area (cm²)
T1	235.00±14.42 b	123.67±7.02 b	86.63±6.01 b	9.82±1.00 b
T2	417.33±14.47 a	338.00±12.77 a	147.66±14.99 a	17.82±1.49 a
T3	107.67±8.96 c	62.67±7.64 c	67.67±3.71 c	6.75±0.54 c

图7 外源蔗糖对桃幼苗根系表型的影响 T1-T3同图2。Bar=3 cm

Figure 7 Effects of exogenous sucrose on roots phenotype of peach seedlings T1-T3 see Ffddigure 2. Bar=3 cm

图8 外源蔗糖对桃幼苗根系生长素含量(A)和基因表达量(B-F)的影响 T1-T3同图2。不同小写字母表示处理间差异显著(P<0.05)。

Figure 8 Effects of exogenous sucrose on auxin content (A) and gene expression (B-F) in peach seedling roots T1-T3 see Ffddigure 2. Different lowercase letters above the bars indicate significant differences among different treatments (P<0.05).

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