Plant Vascular Tissues—Connecting Tissue Comes in All Shapes

Hellmann, Eva; Ko, Donghwi; Ruonala, Raili; Helariutta, Yrjö

doi:10.3390/plants7040109

Cited by 17 publications

(13 citation statements)

References 137 publications

(184 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lignification is governed mainly by genes involved in lignin biosynthesis and by master regulators of vascular development, regulating xylem, and xylem fiber cell differentiation, including members of the vascular-related NAC domain (VND) (Ohashi-Ito et al, 2010) and NAC secondary-wall thickening promoting factor/secondary-wall-associated NAC domain protein (NST/SND) (Zhong et al, 2006; Zhong et al, 2007). Most information on these genes is available from studies in Arabidopsis (Yamaguchi et al, 2008; Hussey et al, 2011) and wood formation (Hellmann et al, 2018). These upstream regulatory NAC domain transcription factors act as either activators or repressors of lignin biosynthesis (Taylor-Teeples et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

Gibberellin Promotes Sweetpotato Root Vascular Lignification and Reduces Storage-Root Formation

et al. 2019

View full text Add to dashboard Cite

Sweetpotato yield depends on a change in the developmental fate of adventitious roots into storage-roots. The mechanisms underlying this developmental switch are still unclear. We examined the hypothesis claiming that regulation of root lignification determines storage-root formation. We show that application of the plant hormone gibberellin increased stem elongation and root gibberellin levels, while having inhibitory effects on root system parameters, decreasing lateral root number and length, and significantly reducing storage-root number and diameter. Furthermore, gibberellin enhanced root xylem development, caused increased lignin deposition, and, at the same time, decreased root starch accumulation. In accordance with these developmental effects, gibberellin application upregulated expression levels of sweetpotato orthologues of Arabidopsis vascular development regulators (IbNA075, IbVND7, and IbSND2) and of lignin biosynthesis genes (IbPAL, IbC4H, Ib4CL, IbCCoAOMT, and IbCAD), while downregulating starch biosynthesis genes (IbAGPase and IbGBSS) in the roots. Interestingly, gibberellin downregulated root expression levels of orthologues of the Arabidopsis BREVIPEDICELLUS transcription factor (IbKN2 and IbKN3), regulator of meristem maintenance. The results substantiate our hypothesis and mark gibberellin as an important player in regulation of sweetpotato root development, suggesting that increased fiber formation and lignification inhibit storage-root formation and yield. Taken together, our findings provide insight into the mechanisms underlying sweetpotato storage-root formation and provide a valuable database of genes for further research.

show abstract

Section: Introductionmentioning

confidence: 99%

Gibberellin Promotes Sweetpotato Root Vascular Lignification and Reduces Storage-Root Formation

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The basic principles of root vascular development, provascular tissue formation and xylem differentiation, are described in the article from Hellmann et al [4] where the key genetic pathways of primary and secondary development of Arabidopsis thaliana root are extensively reviewed, together with vascular development in shoot and hypocotyls. In this work the authors also focus on how this knowledge can and has been applied to agronomically important plants for production of wood and edible tubers as storage organs, providing important strategies and ideas to improve cambial activity in these processes [4].…”

Section: Key Questions In Root Developmental Biology and Target Gementioning

confidence: 99%

“…Vascular development underlies every organogenesis and morphogenesis process to ensure resource delivery and mechanical support to any tissue and organ. Hellmann et al [4] provide a comprehensive overview of the research on Arabidopsis thaliana vascular development and then focus on how this knowledge has been applied and expanded in research on the wood of trees and storage organs of crop plants. Basic principles of vascular development in roots, hypocotyl, leaves, and stems are reviewed, and gene regulatory networks involved are dissected and compared amongst models, woody species and Brassica crops, providing important hints on how to modulate cambial activity to improve productivity [4].…”

Section: Heading To the Sun: Vascular Growth And Developmental Chamentioning

confidence: 99%

“…When we called for this Special Issue we were not prepared to such a prompt and enthusiastic response from the many friends/colleagues working in basic or applied research. We received many excellent manuscripts that made a major effort in forecasting translational solutions to improve crop production while addressing and reviewing fundamental knowledge of key plant developmental processes in model species [2,3,4,5,6]. Important contributions also came from researchers working on crop species [7,8] and plant breeding companies [6,9] that decided to openly share their strategies with the scientific community.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Plant Development and Organogenesis: From Basic Principles to Applied Research

Frugis

2019

Plants

View full text Add to dashboard Cite

The way plants grow and develop organs significantly impacts the overall performance and yield of crop plants. The basic knowledge now available in plant development has the potential to help breeders in generating plants with defined architectural features to improve productivity. Plant translational research effort has steadily increased over the last decade, due to the huge increase in the availability of crop genomic resources and Arabidopsis-based sequence annotation systems. However, a consistent gap between fundamental and applied science has yet to be filled. One critical point is often the unreadiness of developmental biologists on one side, to foresee agricultural applications for their discoveries, and of the breeders on the other, to exploit gene function studies to apply candidate gene approaches when advantageous. In this Special Issue, developmental biologists and breeders make a special effort to reconcile research on basic principles of plant development and organogenesis with its applications to crop production and genetic improvement. Fundamental and applied science contributions interwine and chase each other, giving the reader different but complementary perpectives from only apparently distant corners of the same world.

show abstract

“…The protophloem sieve element is the first tissue to differentiate in the root meristem, a phenomenon which was recently reported to be controlled through a tissue-specific regulation of auxin transport and signalling in the early sieve element cell file [ 6 ]. Mechanisms of vascular patterning and early phloem development have been intensely studied and discussed over the recent years [ 2 , 3 , 4 , 5 , 7 , 8 ]. For a detailed overview of the topic, we refer the reader to the excellent work of our colleagues.…”

Section: Introductionmentioning

confidence: 99%

Sieve Plate Pores in the Phloem and the Unknowns of Their Formation

Kalmbach

Helariutta

2019

Plants

Self Cite

View full text Add to dashboard Cite

Sieve pores of the sieve plates connect neighboring sieve elements to form the conducting sieve tubes of the phloem. Sieve pores are critical for phloem function. From the 1950s onwards, when electron microscopes became increasingly available, the study of their formation had been a pillar of phloem research. More recent work on sieve elements instead has largely focused on sieve tube hydraulics, phylogeny, and eco-physiology. Additionally, advanced molecular and genetic tools available for the model species Arabidopsis thaliana helped decipher several key regulatory mechanisms of early phloem development. Yet, the downstream differentiation processes which form the conductive sieve tube are still largely unknown, and our understanding of sieve pore formation has only moderately progressed. Here, we summarize our current knowledge on sieve pore formation and present relevant recent advances in related fields such as sieve element evolution, physiology, and plasmodesmata formation.

show abstract

Plant Vascular Tissues—Connecting Tissue Comes in All Shapes

Cited by 17 publications

References 137 publications

Gibberellin Promotes Sweetpotato Root Vascular Lignification and Reduces Storage-Root Formation

Gibberellin Promotes Sweetpotato Root Vascular Lignification and Reduces Storage-Root Formation

Plant Development and Organogenesis: From Basic Principles to Applied Research

Sieve Plate Pores in the Phloem and the Unknowns of Their Formation

Contact Info

Product

Resources

About