Two routes to germinate a seed

Machin, Darren C.; Bennett, Tom

doi:10.1038/s41477-020-0678-3

Cited by 9 publications

(9 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Seed germination is a highly complex but well‐coordinated process, in which abscisic acid (ABA) plays important regulatory roles (Machin and Bennett, 2020) by preventing seeds from germination under unfavourable conditions (Nakashima and Yamaguchi‐Shinozaki, 2013). Two systems for ABA transport across plasma membrane (PM) from the site of its biosynthesis (i.e., the endosperm) to the site of its action (i.e., the embryo) for seed germination have been reported to be active under ambient temperature.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

HSP70‐16 and VDAC3 jointly inhibit seed germination under cold stress in Arabidopsis

Ashraf

Mao

Hong

et al. 2021

Plant Cell & Environment

View full text Add to dashboard Cite

Abscisic acid (ABA) transport plays a crucial role in seed germination under unfavourable conditions such as cold stress. Both heat shock protein 70 (HSP70) and voltage‐dependent anion channel (VDAC) protein are involved in cold stress responses in Arabidopsis. However, their roles in seed germination with regard to ABA signaling remain unknown. Here we demonstrated that Arabidopsis HSP70‐16 and VDAC3 jointly suppress seed germination under cold stress conditions. At 4°C, both HSP70‐16 and VDAC3 facilitated the efflux of ABA from the endosperm to the embryo and thus inhibited seed germination. HSP70‐16 interacted with VDAC3 on the plasma membrane and in the nucleus, and the interplay between HSP70‐16 and VDAC3 activated the opening of the VDAC3 ion channel. Our work established a novel function of HSP70‐16 in seed germination under cold stress and a possible association of VDAC3 activity with ABA transportation from endosperm to embryo under cold stress conditions. This study reveals that HSP70‐16 interacts with VDAC3 and facilitates the opening of the VDAC3 ion channel, which influences ABA efflux from endosperm to embryo, thus negatively regulates seed germination under cold stress.

show abstract

Section: Introductionmentioning

confidence: 99%

“…Seed germination is a highly complex but well-coordinated process, in which abscisic acid (ABA) plays important regulatory roles (Machin and Bennett, 2020) by preventing seeds from germination under unfavourable conditions (Nakashima and Yamaguchi-Shinozaki, 2013).…”

Section: Introductionmentioning

confidence: 99%

HSP70‐16 and VDAC3 jointly inhibit seed germination under cold stress in Arabidopsis

Ashraf

Mao

Hong

et al. 2021

Plant Cell & Environment

View full text Add to dashboard Cite

show abstract

“…These results indicate a role of ABA in Striga seed conditioning and germination and point to the presence of functional ABA biosynthesis and perception. It can be assumed that FL-induced seed germination occurs via an SL-independent signaling pathway (Machin & Bennett, 2020).…”

Section: Introductionmentioning

confidence: 99%

Abscisic acid inhibits germination of Striga seeds and is released by them likely as a rhizospheric signal supporting host infestation

Jamil,

Alagoz,

Wang

et al. 2024

The Plant Journal

View full text Add to dashboard Cite

SUMMARYSeeds of the root parasitic plant Striga hermonthica undergo a conditioning process under humid and warm environments before germinating in response to host‐released stimulants, particularly strigolactones (SLs). The plant hormone abscisic acid (ABA) regulates different growth and developmental processes, and stress response; however, its role during Striga seed germination and early interactions with host plants is under‐investigated. Here, we show that ABA inhibited Striga seed germination and that hindering its biosynthesis induced conditioning and germination in unconditioned seeds, which was significantly enhanced by treatment with the SL analog rac‐GR24. However, the inhibitory effect of ABA remarkably decreased during conditioning, confirming the loss of sensitivity towards ABA in later developmental stages. ABA measurement showed a substantial reduction of its content during the early conditioning stage and a significant increase upon rac‐GR24‐triggered germination. We observed this increase also in released seed exudates, which was further confirmed by using the Arabidopsis ABA‐reporter GUS marker line. Seed exudates of germinated seeds, containing elevated levels of ABA, impaired the germination of surrounding Striga seeds in vitro and promoted root growth of a rice host towards germinated Striga seeds. Application of ABA as a positive control caused similar effects, indicating its function in Striga/Striga and Striga/host communications. In summary, we show that ABA is an essential player during seed dormancy and germination processes in Striga and acts as a rhizospheric signal likely to support host infestation.

show abstract

“…However, little attention has been paid to the role of strigolactones (SL) in plant–aphid interactions. SLs fulfil many important roles in the control of plant growth and architecture, seed dormancy and senescence as well as abiotic stress tolerance [ 23 , 24 , 25 ]. These carotenoid-derived phytohormones are also critical regulators of plant–microbe interactions in the rhizosphere, such as the symbiosis with arbuscular mycorrhizal fungi [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

The Effects of High CO2 and Strigolactones on Shoot Branching and Aphid–Plant Compatibility Control in Pea

Swiegers

Karpińska

et al. 2022

IJMS

View full text Add to dashboard Cite

Elevated atmospheric CO2 concentrations (eCO2) regulate plant architecture and susceptibility to insects. We explored the mechanisms underpinning these responses in wild type (WT) peas and mutants defective in either strigolactone (SL) synthesis or signaling. All genotypes had increased shoot height and branching, dry weights and carbohydrate levels under eCO2, demonstrating that SLs are not required for shoot acclimation to eCO2. Since shoot levels of jasmonic acid (JA) and salicylic acid (SA) tended to be lower in SL signaling mutants than the WT under ambient conditions, we compared pea aphid performance on these lines under both CO2 conditions. Aphid fecundity was increased in the SL mutants compared to the WT under both ambient and eCO2 conditions. Aphid infestation significantly decreased levels of JA, isopentenyladenine, trans-zeatin and gibberellin A4 and increased ethylene precursor ACC, gibberellin A1, gibberellic acid (GA3) and SA accumulation in all lines. However, GA3 levels were increased less in the SL signaling mutants than the WT. These studies provide new insights into phytohormone responses in this specific aphid/host interaction and suggest that SLs and gibberellins are part of the network of phytohormones that participate in host susceptibility.

show abstract

Two routes to germinate a seed

Cited by 9 publications

References 11 publications

HSP70‐16 and VDAC3 jointly inhibit seed germination under cold stress in Arabidopsis

HSP70‐16 and VDAC3 jointly inhibit seed germination under cold stress in Arabidopsis

Abscisic acid inhibits germination of Striga seeds and is released by them likely as a rhizospheric signal supporting host infestation

The Effects of High CO2 and Strigolactones on Shoot Branching and Aphid–Plant Compatibility Control in Pea

Contact Info

Product

Resources

About