Drought escape during the late growth stage through early recovery from initial drying stress by hydropriming of upland rice

This study investigated the interactions between soil moisture conditions and seed priming on initial and late growth over 2 years (2017-2018) through field trials and container experiments with regulated soil moisture. Field trials were conducted on rainfed upland rice fields in Uganda, East Africa...

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Bibliographic Details
Published in:Plant production science 2022-07, Vol.25 (3), p.269-279
Main Authors: Nakao, Yoshihiro, Yoshino, Minoru, Miyamoto, Kisho, Yabuta, Shin, Kamioka, Rieko, Hatanaka, Keisuke, Sakagami, Jun-Ichi
Format: Article
Language:English
Subjects:
africa
direct sowing
Drought
Growth stage
Hills
NERICA
Plant growth
Priming
Rainfall
rainfed
Recovery
Rice
Rice fields
Seeds
Soil improvement
Soil investigations
Soil moisture
Soil stresses
Waterlogged ground
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Summary:This study investigated the interactions between soil moisture conditions and seed priming on initial and late growth over 2 years (2017-2018) through field trials and container experiments with regulated soil moisture. Field trials were conducted on rainfed upland rice fields in Uganda, East Africa, where primed and control seeds were planted in triplicate and cultivated. In 2017, the percentage of first heading (head emergence) of hills was higher in priming treatments, and the time for 20% of the hills to achieve the first heading (H20) was significantly earlier than in controls. Additionally, grain ratio (number of fertile grains to sterile grains) and H20 were negatively correlated (P
ISSN:1343-943X
1349-1008
DOI:10.1080/1343943X.2022.2054830