2021
DOI: 10.3390/ijms22168400
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Optimal Brassinosteroid Levels Are Required for Soybean Growth and Mineral Nutrient Homeostasis

Abstract: Brassinosteroids (BRs) are steroid phytohormones that are known to regulate plant growth and nutrient uptake and distribution. However, how BRs regulate nutrient uptake and balance in legume species is not fully understood. Here, we show that optimal BR levels are required for soybean (Glycine max L.) seedling growth, as treatments with both 24-epicastasterone (24-epiCS) and the BR biosynthesis inhibitor propiconazole (PPZ) inhibit root growth, including primary root elongation and lateral root formation and e… Show more

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Cited by 12 publications
(8 citation statements)
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“…At the same time, Wang et al 34 suggest that the transcriptional factor BZR1, a BR's positive regulator, possibly plays a critical role in N-starvation response in tomatoes. Also, Cheng et al 35 reported that optimum levels of 24-epicastasterone regulated soybean growth and macronutrients homeostasis.…”
Section: Discussionmentioning
confidence: 99%
“…At the same time, Wang et al 34 suggest that the transcriptional factor BZR1, a BR's positive regulator, possibly plays a critical role in N-starvation response in tomatoes. Also, Cheng et al 35 reported that optimum levels of 24-epicastasterone regulated soybean growth and macronutrients homeostasis.…”
Section: Discussionmentioning
confidence: 99%
“…Taken together, our findings demonstrate the negative effect of high concentrations of BR on cell proliferation and cell elongation-related genes and suggest that optimal BR level in the root is critical for optimal root elongation. A recent study has demonstrated that optimal BR levels are required for root growth, as well as mineral nutrient homeostasis in soybean [ 32 ].…”
Section: Discussionmentioning
confidence: 99%
“…Moreover, evidence has shown that both the synthesis and transport of auxin are regulated by the absorption and compartmentalization of nutrients such as S and nitrate, suggesting a relationship between hormone and nutrient uptake [ 67 , 68 ]. Another class of phytohormones, brassinosteroids (BRs), has recently been linked to photomorphogenesis, skotomorphogenesis, and root development processes [ 69 , 70 ]. In the dark, skotomorphogenesis is achieved through the activation of the photomorphogenic repressor COP1–SPA complex, which in turn leads to the ubiquitination and degradation of downstream signaling components such as the photomorphogenesis-promoting transcription factors HY5, LONG HYPOCOTYL IN FAR RED (HFR1), GATA2, and B-BOX21 [ 70 , 71 ].…”
Section: Light Signaling Network Of Nutrient Uptake and Utilizationmentioning
confidence: 99%
“…BRs play a key role in the balance of nutrient homeostasis and root growth as demonstrated by the exogenous application of BR biosynthesis inhibitors, which decreased P, K, Mg, Fe, and Mg concentrations [ 69 ]. The role of ABA–light interactions is evident in several physiological processes, such as seedling growth, shade avoidance, stem elongation, and leaf development [ 74 ].…”
Section: Light Signaling Network Of Nutrient Uptake and Utilizationmentioning
confidence: 99%