Germination characteristics of early successional annual species after severe drought in the Mongolian steppe

Kinugasa, Toshihiko; Hozumi, Y.; Nishizima, Haruka; Ishitobi, Ayako; Miyawaki, Mami

doi:10.1016/j.jaridenv.2016.03.010

Cited by 6 publications

(6 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For example, the dormancy of black C . album seeds can be alleviated either after storage for 330 d at room temperature [ 21 ] or after ripening at low temperatures in the dark moist conditions for 4 to 52 weeks [ 8 , 22 , 23 ]. High levels of endogenous nitrate can improve the germination response to ethylene or GA4+7 [ 24 ], and exposure of seeds to exogenous nitrate can promote germination [ 22 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

Germination ecology of Chenopodium album L. and implications for weed management

Tang

Guo²,

Yin³

et al. 2022

PLoS ONE

View full text Add to dashboard Cite

Chenopodium album L. is a troublesome annual species in various cropping systems, and a sound knowledge of the ecological response of C. album germination to environmental factors would suggest suitable management strategies for inhibiting its spread. Preliminary laboratory-based research was conducted to investigate germination and emergence requirements of C. album under various environmental conditions (e.g., photoperiods, constant temperature, salinity, moisture, soil pH, burial depth, and oat crop residue). Results showed C. album seeds were found to be photoblastic, with only 13% germination in darkness. The maximum germination (94%) of C. album occurred at an optimal temperature of 25°C, and the depressive effect of other temperatures on germination was more severe at lower rather than higher temperatures. Seed germination was suitably tolerant of salinity and osmotic potential, with germination observed at 200 mM NaCl (37.0%) and -0.8 MPa (20%), respectively. Germination was relatively uniform (88–92%) at pH levels ranging from 4 to 10. The maximum germination of C. album was observed on the soil surface, with no or rare emergence of seeds at a burial depth of 2 cm or under 7000 kg ha-1 oat straw cover, respectively. Information provided by this study will help to develop more sustainable and effective integrated weed management strategies for the control of C. album, including (i) a shallow-tillage procedures to bury weed seeds in conventional-tillage systems and (ii) oat residue retention or coverage on the soil surface in no-tillage systems.

show abstract

Section: Introductionmentioning

confidence: 99%

Germination ecology of Chenopodium album L. and implications for weed management

Tang

Guo²,

Yin³

et al. 2022

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…On the other hand, in tested grassland species other than A. adamsii , the light requirement for germination and phytotoxic inhibition of germination by A. adamsii residue were low, except in A. frigida (Table 1, Fig. S6; Bai et al ., 1995; Ronnenberg et al ., 2007; Kinugasa et al ., 2016), indicating that those species can establish themselves within A. adamsii communities. As A. adamsii has low palatability to most livestock in Mongolia, plants growing within its community can be protected from herbivory and their survival would be enhanced, especially for highly palatable grass species like S. krylovii and A. cristatum .…”

Section: Resultsmentioning

confidence: 99%

Germination characteristics and phytotoxic inhibition of germination in Artemisia adamsii, a low-palatability weed in the Mongolian steppe

et al. 2019

Self Cite

View full text Add to dashboard Cite

Artemisia adamsii is a weed with low palatability to livestock and is thus recognized as an indicator of rangeland degradation in Mongolia. We investigated the germination characteristics of this species, phytotoxic suppression of its germination by its own residue, and the applicability of such germination behaviour to the control of this species. We also discussed the ecological consequence of these factors regarding the vegetation dynamics of the Mongolian steppe. Germination of A. adamsii was tested at different light and temperature conditions. Germination was also tested for A. adamsii and four native grassland species in the presence or absence of A. adamsii residue. Germination of A. adamsii was light-demanding and temperature-dependent. Artemisia adamsii residue showed autotoxic but sub-fatal suppression of germination, and the chemicals causing that suppression were shown to be aqueous and volatile. Phytotoxicity of A. adamsii residue on the germination of grassland species was low, except for in Artemisia frigida. The applicability of the observed sub-fatal autotoxicity for controlling this species was likely to be low, but the elucidated germination characteristics could contribute to developing a strategy for controlling this species. The autotoxicity in A. adamsii germination was suggested to have an ecological consequence that mediates species transition from A. adamsii to other species in degraded land occupied by A. adamsii. As low-palatability A. adamsii can act as a nurse plant of palatable species under grazing conditions, the invasion of A. adamsii into disturbed grasslands may facilitate the recovery of such grasslands in terms of improving pasture quality.

show abstract

“…Darkness significantly reduced the germinative force of perennial forbs, but had no significant effect on perennial grasses or annual and biennial plants. Previous studies had shown that two Chenopodium plants had low seed final germination percentage under the combined action of light and temperature ( Kinugasa et al, 2016 ). These differences led to variation in the germination time and space of different species and functional groups in semiarid grassland community.…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, the various responses of seed germination to light and temperature in plant communities may be related to the identity of plant functional groups. In a previous study examining the early succession of Mongolian steppe after drought, the forbs of two Chenopodium species had a lower seed germination rate compared with Salosla collina , an annual plant ( Kinugasa et al, 2016 ). Light can significantly reduce the seed germination rate of perennial grasses regardless of temperature and water conditions ( Hu et al, 2013 ).…”

Section: Introductionmentioning

confidence: 93%

Differential responses of the seed germination of three functional groups to low temperature and darkness in a typical steppe, Northern China

Liu

Qiao

Zhang

et al. 2022

PeerJ

View full text Add to dashboard Cite

Seed germination is a key stage in the life history of plants, which has a crucial effect on plant community structure. Climate change has substantially altered the surface soil temperature and light availability, which can affect seed germination. However, whether the seed germination of different functional groups is affected by the interactions of light and temperature remains unclear. Under laboratory conditions, we examined the effects of low temperature and darkness, as well as their interaction, on the seed germination of 16 species belonging to three plant functional groups (annual and biennials, perennial grasses, and perennial forbs) in a typical steppe, Northern China. We found that low temperature had a significant negative effect on seed germination of all species. Low temperature significantly decreased the final germination percentage and germinative force of the three plant functional groups, and the germination duration of perennial grasses. Darkness significantly decreased the germinative force of perennial forbs and total seeds, and the germination duration of perennial grasses. The interactive effects of light and temperature on the seed final germination percentage and germinative force of perennial grass indicated that darkness strengthened the inhibitory effect of low temperature on the seed germination of the grass functional group. Our study indicate that the seed germination of different plant functional groups varied greatly in response to changing environmental conditions. Our results suggest that future climate change could alter the regeneration and species composition of plant communities through changing seed germination.

show abstract

Germination characteristics of early successional annual species after severe drought in the Mongolian steppe

Cited by 6 publications

References 17 publications

Germination ecology of Chenopodium album L. and implications for weed management

Germination ecology of Chenopodium album L. and implications for weed management

Germination characteristics and phytotoxic inhibition of germination in Artemisia adamsii, a low-palatability weed in the Mongolian steppe

Differential responses of the seed germination of three functional groups to low temperature and darkness in a typical steppe, Northern China

Contact Info

Product

Resources

About