How Strigolactone Shapes Shoot Architecture

Khuvung, Khopeno; Gutierrez, Federico A O Silva; Reinhardt, Didier

doi:10.3389/fpls.2022.889045

Cited by 13 publications

(8 citation statements)

References 161 publications

(273 reference statements)

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“…Thus, increased fructose mobilization by high expression of SWEET17 , as occurring under drought, leads to suppression of BRC1 and MAX2 , which in sum stimulates branching. Because MAX2 expression and signaling are directly influenced by factors such as strigolactone concentration (Chevalier et al, 2014; Khuvung et al, 2022) it is not surprising that observed MAX2 expression differences between wild types and sweet17 mutants are not significant (Figure 5 B). Anyhow MAX2 expression supports the observed BRC1 regulation and branching differences between wild types and sweet17 mutants (Figure 4 and Figure 5 A).…”

Section: Discussionmentioning

confidence: 99%

Carbohydrate distribution via SWEET17 is critical for Arabidopsis inflorescence branching under drought

Valifard

Khan

Hir

et al. 2023

Preprint

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Sugars Will Eventually be Exported Transporters (SWEETs) are the most recently discovered family of plant sugar transporters. Functioning as uniporters and thus facilitating the diffusion of sugars across cell membranes, SWEETs play an important role in various physiological processes such as abiotic stress adaptation. AtSWEET17, a vacuolar fructose facilitator, was shown to be involved in the modulation of the root system during drought. Moreover, overexpression of a homolog from apple results in increased drought tolerance of tomato plants. Therefore, SWEET17 appears to be essential for the plants drought response. Nevertheless, the role and function of SWEET17 in aboveground tissues under drought stress to date remains enigmatic. By combining gene expression analysis with analysis of the sugar profile of various aboveground tissues, we uncovered a putative role of SWEET17 in the carbohydrate supply, and thus cauline branch emergence and growth, particularly during periods of carbon limitation as occurs under drought stress. SWEET17 thereby being of critical importance for maintaining efficient reproduction under drought stress.

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Section: Discussionmentioning

confidence: 99%

Carbohydrate distribution via SWEET17 is critical for Arabidopsis inflorescence branching under drought

Valifard

Khan

Hir

et al. 2023

Preprint

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“…Strigolactone can also stimulate shoot elongation by modulating auxin transport, leading to increased plant height with higher concentrations of strigolactone causing more significant height increments [38]. Moreover, they enhance dry weight and root development via better nutrient uptake and increased biomass production [39]. Furthermore, strigolactone promotes branching by inhibiting the outgrowth of axillary buds, increasing the number of primary branches, a desirable trait in agriculture for potential fruit production [40].…”

Section: Morphological Attributesmentioning

confidence: 99%

The role of strigolactone in alleviating salinity stress in chili pepper

Danish,

Hareem,

Dawar

et al. 2024

BMC Plant Biol

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Salinity stress can significantly delay plant growth. It can disrupt water and nutrient uptake, reducing crop yields and poor plant health. The use of strigolactone can be an effective technique to overcome this issue. Strigolactone enhances plant growth by promoting root development and improvement in physiological attributes. The current pot study used strigolactone to amend chili under no salinity and salinity stress environments. There were four treatments, i.e., 0, 10µM strigolactone, 20µM strigolactone and 30µM strigolactone. All treatments were applied in four replications following a completely randomized design (CRD). Results showed that 20µM strigolactone caused a significant increase in chili plant height (21.07%), dry weight (33.60%), fruit length (19.24%), fruit girth (35.37%), and fruit yield (60.74%) compared to control under salinity stress. Significant enhancement in chili chlorophyll a (18.65%), chlorophyll b (43.52%), and total chlorophyll (25.09%) under salinity stress validated the effectiveness of 20µM strigolactone application as treatment over control. Furthermore, improvement in nitrogen, phosphorus, and potassium concentration in leaves confirmed the efficient functioning of 20µM strigolactone compared to other concentrations under salinity stress. The study concluded that 20µM strigolactone is recommended for mitigating salinity stress in chili plants. Growers are advised to apply 20µM strigolactone to enhance their chili production under salinity stress.

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“…SL-biosynthesis takes place mainly in the root [ 100 ] and secondarily in the stem [ 101 ]. They are produced at extremely low concentrations by an isomerase (D27) and two carotenoid cleavage dioxygenases (CCDs), i.e., CCD7/MAX3 and CCD8/MAX4, which convert β-carotene to carlactone.…”

Section: Strigolactones Are Involved In the Regulation Of Lateral And...mentioning

confidence: 99%

New Paradigms in Brassinosteroids, Strigolactones, Sphingolipids, and Nitric Oxide Interaction in the Control of Lateral and Adventitious Root Formation

Altamura

Piacentini

Rovere

et al. 2023

Plants

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The root system is formed by the primary root (PR), which forms lateral roots (LRs) and, in some cases, adventitious roots (ARs), which in turn may produce their own LRs. The formation of ARs is also essential for vegetative propagation in planta and in vitro and for breeding programs. Root formation and branching is coordinated by a complex developmental network, which maximizes the plant’s ability to cope with abiotic stress. Rooting is also a response caused in a cutting by wounding and disconnection from the donor plant. Brassinosteroids (BRs) are steroid molecules perceived at the cell surface. They act as plant-growth-regulators (PGRs) and modulate plant development to provide stress tolerance. BRs and auxins control the formation of LRs and ARs. The auxin/BR interaction involves other PGRs and compounds, such as nitric oxide (NO), strigolactones (SLs), and sphingolipids (SPLs). The roles of these interactions in root formation and plasticity are still to be discovered. SLs are carotenoid derived PGRs. SLs enhance/reduce LR/AR formation depending on species and culture conditions. These PGRs possibly crosstalk with BRs. SPLs form domains with sterols within cellular membranes. Both SLs and SPLs participate in plant development and stress responses. SPLs are determinant for auxin cell-trafficking, which is essential for the formation of LRs/ARs in planta and in in vitro systems. Although little is known about the transport, trafficking, and signaling of SPLs, they seem to interact with BRs and SLs in regulating root-system growth. Here, we review the literature on BRs as modulators of LR and AR formation, as well as their crosstalk with SLs and SPLs through NO signaling. Knowledge on the control of rooting by these non-classical PGRs can help in improving crop productivity and enhancing AR-response from cuttings.

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How Strigolactone Shapes Shoot Architecture

Cited by 13 publications

References 161 publications

Carbohydrate distribution via SWEET17 is critical for Arabidopsis inflorescence branching under drought

Carbohydrate distribution via SWEET17 is critical for Arabidopsis inflorescence branching under drought

The role of strigolactone in alleviating salinity stress in chili pepper

New Paradigms in Brassinosteroids, Strigolactones, Sphingolipids, and Nitric Oxide Interaction in the Control of Lateral and Adventitious Root Formation

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