The role of strigolactone analog (GR24) in endogenous hormone metabolism and hormone-related gene expression in tobacco axillary buds

Tian, Huiyuan; Tang, Boxi; Fan, Wuwei; Pan, Zhiyan; Peng, Jiantao; Wang, Yuanxiu; Liu, Fan; Liu, Guoqin

doi:10.1007/s00299-023-03081-y

Cited by 3 publications

(3 citation statements)

References 104 publications

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“…However, far fewer studies have been reported about SL effects on the outgrowth of axillary buds in ratoon rice. GR24, a synthetic SL analog, has been widely used to study multiple pathways by which SL affects various aspects of plant growth and development [ 18 , 19 , 20 , 24 ]. In this study, we observed that after treatment with GR24, SL significantly inhibits the ratoon rate ( Figure 1 A–D), indicating that SL is involved in the growth regulation of the middle and upper axillary buds of ratoon rice, and that its mechanism is similar to that of tiller regulation.…”

Section: Discussionmentioning

confidence: 99%

“…However, no studies on axillary buds in ratoon rice using RNA-Seq technology have been documented so far, and the molecular mechanism regulating axillary bud outgrowth in ratoon rice is poorly understood. In the present study, to better reveal whether SLs are involved in regulating axillary bud outgrowth in ratoon rice, we used RNA-seq to identify genes in ratoon rice associated with axillary bud outgrowth after the application of GR24, which is widely used in the study of the mechanism of SLs controlling shoot branching in various plants, such as rice [ 18 ], pea [ 7 ], tomato [ 19 ], and tobacco [ 20 ]. The effect of GR24 treatment on the outgrowth of axillary buds including DEGs, phenotypes, and contents of other phytohormones was also comprehensively analyzed.…”

Section: Introductionmentioning

confidence: 99%

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Comparative Transcriptome Analysis Reveals Inhibitory Roles of Strigolactone in Axillary Bud Outgrowth in Ratoon Rice

Ku,

Su,

Peng

et al. 2024

Plants

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Axillary bud outgrowth, a key factor in ratoon rice yield formation, is regulated by several phytohormone signals. The regulatory mechanism of key genes underlying ratoon buds in response to phytohormones in ratoon rice has been less reported. In this study, GR24 (a strigolactone analogue) was used to analyze the ratooning characteristics in rice cultivar Huanghuazhan (HHZ). Results show that the elongation of the axillary buds in the first seasonal rice was significantly inhibited and the ratoon rate was reduced at most by up to 40% with GR24 treatment. Compared with the control, a significant reduction in the content of auxin and cytokinin in the second bud from the upper spike could be detected after GR24 treatment, especially 3 days after treatment. Transcriptome analysis suggested that there were at least 742 and 2877 differentially expressed genes (DEGs) within 6 h of GR24 treatment and 12 h of GR24 treatment, respectively. Further bioinformatics analysis revealed that GR24 treatment had a significant effect on the homeostasis and signal transduction of cytokinin and auxin. It is noteworthy that the gene expression levels of OsCKX1, OsCKX2, OsGH3.6, and OsGH3.8, which are involved in cytokinin or auxin metabolism, were enhanced by the 12 h GR24 treatment. Taken overall, this study showed the gene regulatory network of auxin and cytokinin homeostasis to be regulated by strigolactone in the axillary bud outgrowth of ratoon rice, which highlights the importance of these biological pathways in the regulation of axillary bud outgrowth in ratoon rice and would provide theoretical support for the molecular breeding of ratoon rice.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Comparative Transcriptome Analysis Reveals Inhibitory Roles of Strigolactone in Axillary Bud Outgrowth in Ratoon Rice

Ku,

Su,

Peng

et al. 2024

Plants

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“…Phytohormones are crucial in regulating the number and quality of lateral branches, primarily by controlling cell division and differentiation. This hormonal influence is integral to the developmental pathways that dictate the branching architecture of plants [ 71 , 86 ]. In the current study, it was demonstrated that the SAUR gene is significant in IAA metabolism.…”

Section: Discussionmentioning

confidence: 99%

Physiological Characteristics and Transcriptomic Responses of Pinus yunnanensis Lateral Branching to Different Shading Environments

Zhou,

Gu,

et al. 2024

Plants

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Pinus yunnanensis is an important component of China’s economic development and forest ecosystems. The growth of P. yunnanensis seedlings experienced a slow growth phase, which led to a long seedling cultivation period. However, asexual reproduction can ensure the stable inheritance of the superior traits of the mother tree and also shorten the breeding cycle. The quantity and quality of branching significantly impact the cutting reproduction of P. yunnanensis, and a shaded environment affects lateral branching growth, development, and photosynthesis. Nonetheless, the physiological characteristics and the level of the transcriptome that underlie the growth of lateral branches of P. yunnanensis under shade conditions are still unclear. In our experiment, we subjected annual P. yunnanensis seedlings to varying shade intensities (0%, 25%, 50%, 75%) and studied the effects of shading on growth, physiological and biochemical changes, and gene expression in branching. Results from this study show that shading reduces biomass production by inhibiting the branching ability of P. yunnanensis seedlings. Due to the regulatory and protective roles of osmotically active substances against environmental stress, the contents of soluble sugars, soluble proteins, photosynthetic pigments, and enzyme activities exhibit varying responses to different shading treatments. Under shading treatment, the contents of phytohormones were altered. Additionally, genes associated with phytohormone signaling and photosynthetic pathways exhibited differential expression. This study established a theoretical foundation for shading regulation of P. yunnanensis lateral branch growth and provides scientific evidence for the management of cutting orchards.

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Understanding the interplay between strigolactone and nitric oxide in alleviating cadmium-induced toxicity in Artemisia annua

Wani,

Abdullah,

Naeem

et al. 2024

Environmental and Experimental Botany

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The role of strigolactone analog (GR24) in endogenous hormone metabolism and hormone-related gene expression in tobacco axillary buds

Cited by 3 publications

References 104 publications

Comparative Transcriptome Analysis Reveals Inhibitory Roles of Strigolactone in Axillary Bud Outgrowth in Ratoon Rice

Comparative Transcriptome Analysis Reveals Inhibitory Roles of Strigolactone in Axillary Bud Outgrowth in Ratoon Rice

Physiological Characteristics and Transcriptomic Responses of Pinus yunnanensis Lateral Branching to Different Shading Environments

Understanding the interplay between strigolactone and nitric oxide in alleviating cadmium-induced toxicity in Artemisia annua

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