Genetic Control of Seed Development and Seed Mass

Ohto, Masa‐aki; Stone, Sophia L.; Harada, John J.

doi:10.1002/9780470988848.ch1

Cited by 21 publications

(19 citation statements)

References 128 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Fatty acid biosynthesis and TAG accumulation, part of the seed maturation process of seed development, follows cell division for formation of the embryo proper and is followed by desiccation and seed dormancy development (Ohto et al, 2007 and references therein). Our current understanding of the mechanisms of the developmental regulation that controls seed development, and specifically oil biosynthesis, in this process is reviewed later (Section V.C).…”

Section: Acyl Lipidsmentioning

confidence: 99%

Biosynthesis and Biotechnology of Seed Lipids Including Sterols, Carotenoids and Tocochromanols

Meyer

Kinney

2009

Lipids in Photosynthesis

View full text Add to dashboard Cite

Section: Acyl Lipidsmentioning

confidence: 99%

Biosynthesis and Biotechnology of Seed Lipids Including Sterols, Carotenoids and Tocochromanols

Meyer

Kinney

2009

Lipids in Photosynthesis

View full text Add to dashboard Cite

“…The seed consists of three major compartments, the embryo, endosperm, and seed coat, that originate from different cells of the ovule and possess different complements of maternal and paternal genomes (Bewley and Black 1994; Ohto et al 2008). Seed development proceeds through two distinct phases during which growth of the three compartments is coordinated.…”

Section: Introductionmentioning

confidence: 99%

Effects of APETALA2 on embryo, endosperm, and seed coat development determine seed size in Arabidopsis

et al. 2009

Self Cite

View full text Add to dashboard Cite

Arabidopsis APETALA2 (AP2) controls seed mass maternally, with ap2 mutants producing larger seeds than wild type. Here, we show that AP2 influences development of the three major seed compartments: embryo, endosperm, and seed coat. AP2 appears to have a significant effect on endosperm development. ap2 mutant seeds undergo an extended period of rapid endosperm growth early in development relative to wild type. This early expanded growth period in ap2 seeds is associated with delayed endosperm cellularization and overgrowth of the endosperm central vacuole. The subsequent period of moderate endosperm growth is also extended in ap2 seeds largely due to persistent cell divisions at the endosperm periphery. The effect of AP2 on endosperm development is mediated by different mechanisms than parent-of-origin effects on seed size observed in interploidy crosses. Seed coat development is affected; integument cells of ap2 mutants are more elongated than wild type. We conclude that endosperm overgrowth and/or integument cell elongation create a larger postfertilization embryo sac into which the ap2 embryo can grow. Morphological development of the embryo is initially delayed in ap2 compared with wild-type seeds, but ap2 embryos become larger than wild type after the bent-cotyledon stage of development. ap2 embryos are able to fill the enlarged postfertilization embryo sac, because they undergo extended periods of cell proliferation and seed filling. We discuss potential mechanisms by which maternally acting AP2 influences development of the zygotic embryo and endosperm to repress seed size.

show abstract

“…They are stress-resistant structures that help to bridge unfavorable periods and allow dispersal. Seed formation starts with a double fertilization event, and in Arabidopsis (Arabidopsis thaliana), it takes approximately 20 d to form a mature dry seed (Debeaujon et al, 2007;Ohto et al, 2007). At maturity, three major seed compartments can be distinguished (Holdsworth et al, 2008a;Belmonte et al, 2013): the testa (seed coat), a dead tissue that forms a protective outer layer; the endosperm, a single cell layer of tissue positioned directly underneath the testa; and the embryo (enclosed by the testa and endosperm), which emerges to become the future plant (Rajjou et al, 2012;Fig.…”

mentioning

confidence: 99%

Transcriptional Dynamics of Two Seed Compartments with Opposing Roles in Arabidopsis Seed Germination

et al. 2013

View full text Add to dashboard Cite

Seed germination is a critical stage in the plant life cycle and the first step toward successful plant establishment. Therefore, understanding germination is of important ecological and agronomical relevance. Previous research revealed that different seed compartments (testa, endosperm, and embryo) control germination, but little is known about the underlying spatial and temporal transcriptome changes that lead to seed germination. We analyzed genome-wide expression in germinating Arabidopsis (Arabidopsis thaliana) seeds with both temporal and spatial detail and provide Web-accessible visualizations of the data reported (vseed.nottingham.ac.uk). We show the potential of this highresolution data set for the construction of meaningful coexpression networks, which provide insight into the genetic control of germination. The data set reveals two transcriptional phases during germination that are separated by testa rupture. The first phase is marked by large transcriptome changes as the seed switches from a dry, quiescent state to a hydrated and active state. At the end of this first transcriptional phase, the number of differentially expressed genes between consecutive time points drops. This increases again at testa rupture, the start of the second transcriptional phase. Transcriptome data indicate a role for mechano-induced signaling at this stage and subsequently highlight the fates of the endosperm and radicle: senescence and growth, respectively. Finally, using a phylotranscriptomic approach, we show that expression levels of evolutionarily young genes drop during the first transcriptional phase and increase during the second phase. Evolutionarily old genes show an opposite pattern, suggesting a more conserved transcriptome prior to the completion of germination.

show abstract

Genetic Control of Seed Development and Seed Mass

Cited by 21 publications

References 128 publications

Biosynthesis and Biotechnology of Seed Lipids Including Sterols, Carotenoids and Tocochromanols

Biosynthesis and Biotechnology of Seed Lipids Including Sterols, Carotenoids and Tocochromanols

Effects of APETALA2 on embryo, endosperm, and seed coat development determine seed size in Arabidopsis

Transcriptional Dynamics of Two Seed Compartments with Opposing Roles in Arabidopsis Seed Germination

Contact Info

Product

Resources

About