Biological Functions of Strigolactones and Their Crosstalk With Other Phytohormones

Wu, Fenghui; Gao, Yinping; Yang, Wenjing; Sui, Na; Zhu, Jianping

doi:10.3389/fpls.2022.821563

Cited by 19 publications

(7 citation statements)

References 122 publications

(161 reference statements)

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“…These findings reveal that there is a complex network orchestrated by OsSPL14 that regulates plant architecture in rice. In addition, it has been reported that SL biosynthesis is positively mediated by auxin in both rice and pea (Hayward et al., 2009; Waters et al., 2012), and SLs inhibit auxin feedback on PIN‐dependent auxin transport canalization (Figure S13d; Shinohara et al., 2013; Zhang et al., 2020a; Wu et al., 2022). These findings indicate the possible interaction between SLs and auxin via OsSPL14 , but it remains to be determined whether OsPIN1b / PILS6b directly functions up‐ or downstream of SLs.…”

Section: Discussionmentioning

confidence: 97%

“…OsSPL14, also known as IDEAL PLANT ARCHITECTURE1 (IPA1) or WEALTHY FARMER'S PANICLE (WFP), is a plantspecific transcription factor encoding gene targeted by miR156 and miR529 in rice (Chen et al, 2015;Jiao et al, 2010;Miura et al, 2010;Wang et al, 2015Wang et al, , 2021Xie et al, 2006;Yan et al, 2021). A number of studies have demonstrated that miR156/miR529 and OsSPL14 participate in various processes of rice, such as seedling growth (He et al, 2021;Miao et al, 2019), disease resistance (Liu et al, 2019;Wang et al, 2018b), drought tolerance (Zhu et al, 2022), bract outgrowth (Wang et al, 2021), root elongation (Sun et al, 2019, and architecture foundation (Duan et al, 2019a;Gou et al, 2017;Jiao et al, 2010;Liu et al, 2015b;Miura et al, 2010;Wang et al, 2015Wang et al, , 2021Wang et al, 2017b;Wang et al, 2017a;Zhang et al, 2017). Recently, OsSPL14 was found positively regulated by CIR-CADIAN CLOCK ASSOCIATED1 (OsCCA1), which integrates the sugar response and the SL pathway to balance tiller bud and panicle development (Wang et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

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OsSPL14 acts upstream of OsPIN1b and PILS6b to modulate axillary bud outgrowth by fine‐tuning auxin transport in rice

Liu

et al. 2022

The Plant Journal

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SUMMARY As a multigenic trait, rice tillering can optimize plant architecture for the maximum agronomic yield. SQUAMOSA PROMOTER BINDING PROTEIN‐LIKE14 (OsSPL14) has been demonstrated to be necessary and sufficient to inhibit rice branching, but the underlying mechanism remains largely unclear. Here, we demonstrated that OsSPL14, which is cleaved by miR529 and miR156, inhibits tillering by fine‐tuning auxin transport in rice. RNA interference of OsSPL14 or miR529 and miR156 overexpression significantly increased the tiller number, whereas OsSPL14 overexpression decreased the tiller number. Histological analysis revealed that the OsSPL14‐overexpressing line had normal initiation of axillary buds but inhibited outgrowth of tillers. Moreover, OsSPL14 was found to be responsive to indole‐acetic acid and 1‐naphthylphthalamic acid, and RNA interference of OsSPL14 reduced polar auxin transport and increased 1‐naphthylphthalamic acid sensitivity of rice plants. Further analysis revealed that OsSPL14 directly binds to the promoter of PIN‐FORMED 1b (OsPIN1b) and PIN‐LIKE6b (PILS6b) to regulate their expression positively. OsPIN1b and PILS6b were highly expressed in axillary buds and proved involved in bud outgrowth. Loss of function of OsPIN1b or PILS6b increased the tiller number of rice. Taken together, our findings suggested that OsSPL14 could control axillary bud outgrowth and tiller number by activating the expression of OsPIN1b and PILS6b to fine‐tune auxin transport in rice.

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Section: Discussionmentioning

confidence: 97%

Section: Introductionmentioning

confidence: 99%

OsSPL14 acts upstream of OsPIN1b and PILS6b to modulate axillary bud outgrowth by fine‐tuning auxin transport in rice

Liu

et al. 2022

The Plant Journal

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“…The multiple roles of phytohormones in physiological processes and signaling during abiotic or biotic stress events have been established, and progress continues to be made regarding their crosstalk, as well as their interactions with other molecules or cellular compounds [ 119 , 120 , 121 , 122 , 123 , 124 ]. A study conducted by Kiba et al [ 125 ] highlighted that plants consist of multiple organs with various functions and different nutritional requirements, and they strongly rely on local and long-distance signaling pathways.…”

Section: Multiple Roles Of Nitrogen and N-containing Compoundsmentioning

confidence: 99%

Multiple Facets of Nitrogen: From Atmospheric Gas to Indispensable Agricultural Input

Kabange

Lee

Shin

et al. 2022

Life

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Nitrogen (N) is a gas and the fifth most abundant element naturally found in the atmosphere. N’s role in agriculture and plant metabolism has been widely investigated for decades, and extensive information regarding this subject is available. However, the advent of sequencing technology and the advances in plant biotechnology, coupled with the growing interest in functional genomics-related studies and the various environmental challenges, have paved novel paths to rediscovering the fundamentals of N and its dynamics in physiological and biological processes, as well as biochemical reactions under both normal and stress conditions. This work provides a comprehensive review on multiple facets of N and N-containing compounds in plants disseminated in the literature to better appreciate N in its multiple dimensions. Here, some of the ancient but fundamental aspects of N are revived and the advances in our understanding of N in the metabolism of plants is portrayed. It is established that N is indispensable for achieving high plant productivity and fitness. However, the use of N-rich fertilizers in relatively higher amounts negatively affects the environment. Therefore, a paradigm shift is important to shape to the future use of N-rich fertilizers in crop production and their contribution to the current global greenhouse gases (GHGs) budget would help tackle current global environmental challenges toward a sustainable agriculture.

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“…Recent studies assessed the potential roles of SL in modulating tolerance to abiotic stresses. Also, these studies showed that SLs play positive roles in response to drought and salt stress largely by activating ABA signaling (Wu et al, 2022). Exogenous SL could improve drought tolerance by regulating membrane stability index, antioxidant enzyme activities and relative water content (Sedaghat et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Exogenous strigolactones enhance tolerance in soybean seedlings in response to alkaline stress

Chen

Zhang

et al. 2022

Physiologia Plantarum

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The plant hormone strigolactones (SLs) play crucial roles in regulating plant development and adaptations to abiotic stresses. Even though the functional roles of SLs have been identified in response to abiotic stresses, the function, and mechanism of SLs are not fully established under alkaline stress. In this study, we identified that exogenous SL could improve alkaline tolerance of soybean seedlings, especially when treated with 0.5 μM SL. The application of SL remarkably reduced the malondialdehyde content, hydrogen peroxide content, and increased the activity of antioxidant enzymes under alkaline stress, suggesting that SL improved the alkaline tolerance by regulating the antioxidant defense capacity. The RNA sequencing data showed 530 special differentially expressed genes under SL treatment and alkaline stress, mainly were associated with antioxidant processes and phenylpropanoid biosynthetic pathway. Some transcription factors were also induced by SL under alkaline stress as confirmed by quantitative real-time PCR (qRT-PCR). Furthermore, SL largely increased the Na content in leaves and decreased Na content in roots under alkaline stress, which suggested that SL might promote the transport of Na from the roots to the leaves of the soybean seedlings. Meanwhile, exogenous SL decreased the content of other elements such as K, Mg, Fe, and Cu in leaves or roots under alkaline stress. Collectively, our results suggested a role of SL in regulating antioxidant defense capacity, specific gene expression, and alterations in ionic contents to alleviate harmful effects of alkaline stress in soybean seedlings. | INTRODUCTIONAlkaline stress is an adverse obstacle in the growth and development of plants and severely affects the production of agricultural crops. Compared with neutral salt stress, alkaline stress affects plant cells mainly by osmotic stress, ion injury and, especially, due to high pH. Alkaline stress disturbs the balance of organic acids and reactive oxygen species, photosynthetic rate, and N metabolism (Karuppanapandian et al., 2011;Yang et al., 2009). Alkaline stress with high pH leads to the precipitation of most phosphate and metal ions, which in turn decreases the availability of nutrients for plants (Guo et al., 2015). Some studies have supported that alkaline stress imposes a more serious damages to crops than salt stress due to its complex mechanism of action (Guo et al., 2017;Yang et al., 2007). Thus, understanding the basic mechanisms of plant responses to alkaline stress is essential for improving the alkaline tolerance of crops.Soybean (Glycine max) has been adopted as one of the world's most important seed legumes. Unlike other cereal crops, soybean seeds are a highly valuable source of edible oil and protein (Ravi et al., 2019). In addition, the content of micronutrients and isoflavones increases its nutritive

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Biological Functions of Strigolactones and Their Crosstalk With Other Phytohormones

Cited by 19 publications

References 122 publications

OsSPL14 acts upstream of OsPIN1b and PILS6b to modulate axillary bud outgrowth by fine‐tuning auxin transport in rice

OsSPL14 acts upstream of OsPIN1b and PILS6b to modulate axillary bud outgrowth by fine‐tuning auxin transport in rice

Multiple Facets of Nitrogen: From Atmospheric Gas to Indispensable Agricultural Input

Exogenous strigolactones enhance tolerance in soybean seedlings in response to alkaline stress

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