Flooding stress and<scp>O<sub>2</sub></scp>‐shortage in plants

Iglesias‐Fernández, Raquel; Matilla, Ángel J.

doi:10.1002/9781119054450.ch41

Cited by 4 publications

(2 citation statements)

References 211 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The involvement of PCD has been described in various plant life processes, including the emptying of xylem tracheary elements [26], aerenchyma formation [25,27], and dynamic turnover of the root cap [28]. In addition, PCD is an integral part of the seed development and germination (i.e., dPCD), during which cells of the integuments, nucellus, suspensor, and endosperm face death [5,6].…”

Section: Introductionmentioning

confidence: 99%

Programmed Cell Death in Seeds: An Adaptive Mechanism Required for Life

Matilla¹

2020

Seed Dormancy and Germination

View full text Add to dashboard Cite

The regeneration of the mother plant through germinative process is the main reason that evolutionarily justifies the existence of a viable seed. Current knowledge indicates that the control of germination is a sophisticated process mainly controlled by hormones and reactive oxygen species (ROS), among other endogenous factors. One of the events that directly participate in the germination is the degradation of storage proteins (SPs). Thus, vacuolar processing enzymes (VPEs) contribute to SPs' degradation and mobilization due to direct proteolysis or through the activation of other peptidases. In parallel, the relationship between VPEs and programmed cell death (PCD) is beyond doubt. As an alternative to VPEs, the formation of vesicles called ricinosomes containing papain-like Cys-proteases (PLCPs) and located in the reserve tissues of some germinating seeds also collaborates to protein degradation. Finally, there are increasing evidences linking nucleases to PCD in different tissues of seed. However, its state of the art is still little developed. Together, this current overview illustrates a part of the complexity of PCD in seeds, a puzzle far from being solved.

show abstract

Section: Introductionmentioning

confidence: 99%

Programmed Cell Death in Seeds: An Adaptive Mechanism Required for Life

Matilla¹

2020

Seed Dormancy and Germination

View full text Add to dashboard Cite

show abstract

“…Fluctuations in temperatures and soil water content affect the dormancy status of seed banks in wetland ecosystems, where seed germination takes place as the water level drops and O 2 becomes available (Batlla & Benech-Arnold 2006;Iglesias-Fern andez & Matilla 2016). Diurnal temperature variations (alternating temperatures) were shown to be a requirement for dormancy termination in Polygonum aviculare (Batlla et al 2003).…”

Section: Introductionmentioning

confidence: 99%

Seed dormancy and control of germination in Sisymbrella dentata (L.) O.E. Schulz (Brassicaceae)

et al. 2018

View full text Add to dashboard Cite

Seed germination responsiveness to environmental cues is crucial for plant species living in changeable habitats and can vary among populations within the same species as a result of adaptation or modulation to local climates. Here, we investigate the germination response to environmental cues of Sisymbrella dentata (L.) O.E. Schulz, an annual endemic to Sicily living in Mediterranean Temporary Ponds (MTP), a vulnerable ecosystem. Germination of the only two known populations, Gurrida and Pantano, was assessed over a broad range of conditions to understand the role of temperatures, nitrate, hormones (abscisic acid - ABA and gibberellins - GA) and after-ripening in dormancy release in this species. Seed germination responsiveness varied between the two populations, with seeds from Gurrida germinating under a narrower range of conditions. Overall, this process in S. dentata consisted of testa and endosperm rupture as two sequential events, influenced by ABA and GA biosynthesis. Nitrate addition caused an earlier testa rupture, after-ripening broadened the thermal conditions that allow germination, and alternating temperatures significantly promoted germination of non-after-ripened seeds. Primary dormancy in S. dentata seeds likely allows this plant to form a persistent seed bank that is responsive to specific environmental cues characteristic of MTP habitats.

show abstract