TY - JOUR
T1 - Effects of burial in soil on seed longevity and germinability of the winter annual weed wild barley (Hordeum spontaneum)
AU - Nozarpour, Elham
AU - Edalat, Mohsen
AU - Soltani, Elias
AU - Baskin, Carol C.
AU - Baskin, Jerry M.
AU - Kazemeini, Seyed Abdol Reza
N1 - Publisher Copyright:
© 2024 Weed Science Society of Japan.
PY - 2024/12
Y1 - 2024/12
N2 - Hordeum spontaneum is a winter annual weed that reduces crop yields in Iran. The aim of this study was to quantitatively analyze the effects of burial on seed longevity and germinability and of water potential and temperature on germination. Seeds were placed in nylon-mesh bags and buried in soil in a semi-arid region on 1 July 2018 and exposed to natural temperature regimes. After 2 months of burial, seed viability started to decline with a slope of 0.0169%, and after 9 months all seeds were nonviable. Fresh seeds were dormant, but became non-dormant during summer via dry after-ripening. Thus, by late autumn (December) the seeds germinated to 100% in dark at 5 and 15°C. The base, optimum, and ceiling temperatures were 0.27, 17.5, and 25°C, respectively, at a water potential of 0 MPa. The hydrotime constant was 50.6–426.9 MPa h, base water potential −1.23 to −0.333 MPa and hydrothermal constant 1350.5 MPa °C h. These results can be used to predict timing and extent of weed emergence of H. spontaneum in crops and in planning for sustainable management strategies.
AB - Hordeum spontaneum is a winter annual weed that reduces crop yields in Iran. The aim of this study was to quantitatively analyze the effects of burial on seed longevity and germinability and of water potential and temperature on germination. Seeds were placed in nylon-mesh bags and buried in soil in a semi-arid region on 1 July 2018 and exposed to natural temperature regimes. After 2 months of burial, seed viability started to decline with a slope of 0.0169%, and after 9 months all seeds were nonviable. Fresh seeds were dormant, but became non-dormant during summer via dry after-ripening. Thus, by late autumn (December) the seeds germinated to 100% in dark at 5 and 15°C. The base, optimum, and ceiling temperatures were 0.27, 17.5, and 25°C, respectively, at a water potential of 0 MPa. The hydrotime constant was 50.6–426.9 MPa h, base water potential −1.23 to −0.333 MPa and hydrothermal constant 1350.5 MPa °C h. These results can be used to predict timing and extent of weed emergence of H. spontaneum in crops and in planning for sustainable management strategies.
KW - hydrothermal time model
KW - seed burial
KW - seed dormancy
KW - seed survival
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U2 - 10.1111/wbm.12298
DO - 10.1111/wbm.12298
M3 - Article
AN - SCOPUS:85208945161
SN - 1444-6162
VL - 24
SP - 155
EP - 166
JO - Weed Biology and Management
JF - Weed Biology and Management
IS - 4
ER -