The NAC transcription factor NAC019-A1 is a negative regulator of starch synthesis in wheat developing endosperm

Liu, Yunchuan; Hou, Jian; Wang, Xiaolu; Tian, Li; Majeed, Uzma; Hao, Chenyang; Zhang, Xueyong

doi:10.1093/jxb/eraa333

Cited by 65 publications

(63 citation statements)

References 75 publications

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“…ONAC127 and ONAC129 are not directly involved in starch synthesis in the rice endosperm, but they do form heterodimers that participate in apoplastic transport and the heat stress response to regulate rice grain filling, including starch accumulation ( Ren et al., 2021 ). In wheat, the endosperm-specific TaNAC019 was also found to regulate glutenin and starch accumulation by directly activating the expression of relevant genes ( Liu et al., 2020 ; Gao et al., 2021 ).…”

Section: Regulatory Network Of Starch Synthesis In Cereal Endospermsmentioning

confidence: 99%

Starch biosynthesis in cereal endosperms: An updated review over the last decade

Huang

Tan

Zhang

et al. 2021

Plant Communications

147

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Starch is a vital energy source for living organisms and is a key raw material and additive in the food and non-food industries. Starch has received continuous attention in multiple research fields. The endosperm of cereals (e.g., rice, corn, wheat, and barley) is the most important site for the synthesis of storage starch. Around 2010, several excellent reviews summarized key progress in various fields of starch research, serving as important references for subsequent research. In the past 10 years, many achievements have been made in the study of starch synthesis and regulation in cereals. The present review provides an update on research progress in starch synthesis of cereal endosperms over the past decade, focusing on new enzymes and non-enzymatic proteins involved in starch synthesis, regulatory networks of starch synthesis, and the use of elite alleles of starch synthesis-related genes in cereal breeding programs. We also provide perspectives on future research directions that will further our understanding of cereal starch biosynthesis and regulation to support the rational design of ideal quality grain.

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Section: Regulatory Network Of Starch Synthesis In Cereal Endospermsmentioning

confidence: 99%

Starch biosynthesis in cereal endosperms: An updated review over the last decade

Huang

Tan

Zhang

et al. 2021

Plant Communications

147

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“…A transcription factor, ZmEREB94, acts as a negative regulator of starch synthesis through regulating the expression of Shrunken-2 (sh2), Wx, SSI, BT1, and SBE1 in maize [93]. A NAC TF NAC019-A1 can bind to the promoter of the AGPase small subunit 1 and repress its expression, hence negatively regulating starch synthesis in wheat endosperms [94]. In addition, some experimental data provide evidence that some TFs regulate the accumulation of both starch and storage proteins.…”

Section: Transcriptional Regulation Network Of Starch Metabolismmentioning

confidence: 99%

Understanding Starch Metabolism in Pea Seeds towards Tailoring Functionality for Value-Added Utilization

Xiang

Mahfuz

et al. 2021

IJMS

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Starch is the most abundant storage carbohydrate and a major component in pea seeds, accounting for about 50% of dry seed weight. As a by-product of pea protein processing, current uses for pea starch are limited to low-value, commodity markets. The globally growing demand for pea protein poses a great challenge for the pea fractionation industry to develop new markets for starch valorization. However, there exist gaps in our understanding of the genetic mechanism underlying starch metabolism, and its relationship with physicochemical and functional properties, which is a prerequisite for targeted tailoring functionality and innovative applications of starch. This review outlines the understanding of starch metabolism with a particular focus on peas and highlights the knowledge of pea starch granule structure and its relationship with functional properties, and industrial applications. Using the currently available pea genetics and genomics knowledge and breakthroughs in omics technologies, we discuss the perspectives and possible avenues to advance our understanding of starch metabolism in peas at an unprecedented level, to ultimately enable the molecular design of multi-functional native pea starch and to create value-added utilization.

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“…In wheat and rice endosperms the transcription factor TaNAC019-A1 negatively regulates starch synthesis. Its overexpression reduced significantly starch content, kernel weight, and kernel width ( Liu et al, 2020 ). Recently, Song et al (2020) identified a transcriptional activator of starch synthesis (TabZIP28) in wheat.…”

Section: Starch Biosynthesismentioning

confidence: 99%

The Triple Jags of Dietary Fibers in Cereals: How Biotechnology Is Longing for High FiberGrains

Botticella¹,

Savatin²,

Sestili³

2021

Front. Plant Sci.

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Cereals represent an important source of beneficial compounds for human health, such as macro- and micronutrients, vitamins, and bioactive molecules. Generally, the consumption of whole-grain products is associated with significant health benefits, due to the elevated amount of dietary fiber (DF). However, the consumption of whole-grain foods is still modest compared to more refined products. In this sense, it is worth focusing on the increase of DF fractions inside the inner compartment of the seed, the endosperm, which represents the main part of the derived flour. The main components of the grain fiber are arabinoxylan (AX), β-glucan (βG), and resistant starch (RS). These three components are differently distributed in grains, however, all of them are represented in the endosperm. AX and βG, classified as non-starch polysaccharides (NSP), are in cell walls, whereas, RS is in the endosperm, being a starch fraction. As the chemical structure of DFs influences their digestibility, the identification of key actors involved in their metabolism can pave the way to improve their function in human health. Here, we reviewed the main achievements of plant biotechnologies in DFs manipulation in cereals, highlighting new genetic targets to be exploited, and main issues to face to increase the potential of cereals in fighting malnutrition.

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The NAC transcription factor NAC019-A1 is a negative regulator of starch synthesis in wheat developing endosperm

Cited by 65 publications

References 75 publications

Starch biosynthesis in cereal endosperms: An updated review over the last decade

Starch biosynthesis in cereal endosperms: An updated review over the last decade

Understanding Starch Metabolism in Pea Seeds towards Tailoring Functionality for Value-Added Utilization

The Triple Jags of Dietary Fibers in Cereals: How Biotechnology Is Longing for High FiberGrains

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