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A comparative proteomic analysis provides insight into the molecular mechanism of bud break in longan

文献类型： 外文期刊

作者： Jue, Dengwei 1 ; Liu, Liqin 3 ; Sang, Xuelian 1 ; Shi, Shengyou 3 ;

作者机构： 1.Chongqing Univ Arts & Sci, Chongqing Engn Res Ctr Special Plant Seedling, Collaborat Innovat Ctr Special Plant Ind Chongqin, Inst Special Plants,Chongqing Key Lab Econ Plant, Yongchuan 402160, Peoples R China

2.Southwest Univ, Coll Hort & Landscape Architecture, Key Lab Hort Sci Southern Mt Reg, Minist Educ, Chongqing 400715, Peoples R China

3.Chinese Acad Trop Agr Sci, South Subtrop Crops Res Inst, Key Lab Trop Fruit Biol, Minist Agr, Zhanjiang 524091, Peoples R China

关键词： Longan; Flower bud break; iTRAQ; Carbohydrate; Photosynthesis

期刊名称：BMC PLANT BIOLOGY （ 影响因子：5.26； 五年影响因子：5.761 ）

ISSN： 1471-2229

年卷期： 2022 年 22 卷 1 期

页码：

收录情况： SCI

摘要： Background The timing of bud break is very important for the flowering and fruiting of longan. To obtain new insights into the underlying regulatory mechanism of bud break in longan, a comparative analysis was conducted in three flower induction stages of two longan varieties with opposite flowering phenotypes by using isobaric tags for relative and absolute quantification (iTRAQ). Results In total, 3180 unique proteins were identified in 18 samples, and 1101 differentially abundant proteins (DAPs) were identified. "SX" ("Shixia"), a common longan cultivated variety that needs an appropriate period of low temperatures to accumulate energy and nutrients for flower induction, had a strong primary inflorescence, had a strong axillary inflorescence, and contained high contents of sugars, and most DAPs during the bud break process were enriched in assimilates and energy metabolism. Combined with our previous transcriptome data, it was observed that sucrose synthase 6 (SS6) and granule-bound starch synthase 1 (GBSSI) might be the key DAPs for "SX" bud break. Compared to those of "SX", the primary inflorescence, axillary inflorescence, floral primordium, bract, and prophyll of "SJ" ("Sijimi") were weaker. In addition, light, rather than a high sugar content or chilling duration, might act as the key signal for triggering bud break. In addition, catalase isozyme 1, an important enzyme in the redox cycle, and RuBisCO, a key enzyme in the Calvin cycle of photosynthetic carbon assimilation, might be the key DAPs for SJ bud break. Conclusion Our results present a dynamic picture of the bud break of longan, not only revealing the temporal specific expression of key candidate genes and proteins but also providing a scientific basis for the genetic improvement of this fruit tree species.

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