TY - JOUR
T1 - Short-term physiological responses of Larix kaempferi seedlings to spring warming and drought manipulation
AU - Kim, Hyeonji
AU - Jo, Heejae
AU - Kim, Gwang Jung
AU - Kim, Hyung Sub
AU - Son, Yowhan
N1 - Funding Information:
This work is financially supported by Korea Forest Service Government (KFSG) as Graduate School specialized in Carbon Sink. This study was carried out with the support of ‘R&D Program for Forest Science Technology (Project No. “2020181B10-2122-BB01”)’ provided by Korea Forest Service (Korea Forestry Promotion Institute). This work is supported by the Korea Agency for Infrastructure Technology Advancement (KAIA) grant funded by the Ministry of Land, Infrastructure and Transport (Grant 21UMRG-B158194-02). This study was carried out with the support of “R&D Program for Forest Science Technology [Project No. ‘2020181A00-2122-BB01’]” provided by Korea Forest Service (Korea Forestry Promotion Institute).
Funding Information:
This study was carried out with the support of “R&D Program for Forest Science Technology [Project No. ‘2020181A00-2122-BB01’]” provided by Korea Forest Service (Korea Forestry Promotion Institute).
Publisher Copyright:
© 2021 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group.
PY - 2021
Y1 - 2021
N2 - Excessively high temperatures and droughts after winter dormancy can affect the physiological responses of plant seedlings. In the present study, an open-field experiment was conducted to investigate the impact of spring warming and drought treatments on the short-term physiological responses of 1-year-old Larix kaempferi seedlings. The warming treatment was designed to increase the air temperature by 4 °C compared to that of the temperature control plots and was carried out for seven days each in the second and fourth week of May 2020. Moreover, the drought treatment was designed to completely block precipitation for four weeks in May 2020. After the first warming treatment period, stomatal conductance, transpiration rate, and net photosynthetic rate decreased by 35.16%, 29.53%, and 13.34% in the temperature warming plots compared to those in the temperature control plots, respectively. After the resting stage, stomatal conductance and transpiration rate increased by 101.47% and 72.80% in the temperature warming plots compared to those in the temperature control plots, respectively. Stomatal conductance, transpiration rate, and net photosynthetic rate tended to decrease in the drought treatment. The total chlorophyll content did not change under the warming treatment, but it increased by 20.29% in the drought treatment plots compared to that in the precipitation control plots in the fourth week; this may have resulted from chlorophyll hormesis. Furthermore, the correlation and principal component analyses showed that seedling physiological responses and environmental conditions were closely related. We found that spring warming and drought treatments can reduce stomatal conductance, transpiration rate, and net photosynthetic rate, thus affecting seedling growth. This study is expected to be the basis for more in-depth studies on the effects of warming and drought treatments on the growth and phenology of L. kaempferi seedlings.
AB - Excessively high temperatures and droughts after winter dormancy can affect the physiological responses of plant seedlings. In the present study, an open-field experiment was conducted to investigate the impact of spring warming and drought treatments on the short-term physiological responses of 1-year-old Larix kaempferi seedlings. The warming treatment was designed to increase the air temperature by 4 °C compared to that of the temperature control plots and was carried out for seven days each in the second and fourth week of May 2020. Moreover, the drought treatment was designed to completely block precipitation for four weeks in May 2020. After the first warming treatment period, stomatal conductance, transpiration rate, and net photosynthetic rate decreased by 35.16%, 29.53%, and 13.34% in the temperature warming plots compared to those in the temperature control plots, respectively. After the resting stage, stomatal conductance and transpiration rate increased by 101.47% and 72.80% in the temperature warming plots compared to those in the temperature control plots, respectively. Stomatal conductance, transpiration rate, and net photosynthetic rate tended to decrease in the drought treatment. The total chlorophyll content did not change under the warming treatment, but it increased by 20.29% in the drought treatment plots compared to that in the precipitation control plots in the fourth week; this may have resulted from chlorophyll hormesis. Furthermore, the correlation and principal component analyses showed that seedling physiological responses and environmental conditions were closely related. We found that spring warming and drought treatments can reduce stomatal conductance, transpiration rate, and net photosynthetic rate, thus affecting seedling growth. This study is expected to be the basis for more in-depth studies on the effects of warming and drought treatments on the growth and phenology of L. kaempferi seedlings.
KW - Larix kaempferi
KW - climate change
KW - drought
KW - physiology
KW - spring warming
UR - http://www.scopus.com/inward/record.url?scp=85118632685&partnerID=8YFLogxK
U2 - 10.1080/21580103.2021.1997830
DO - 10.1080/21580103.2021.1997830
M3 - Article
AN - SCOPUS:85118632685
SN - 2158-0103
VL - 17
SP - 197
EP - 205
JO - Forest Science and Technology
JF - Forest Science and Technology
IS - 4
ER -
