TY - JOUR
T1 - Elevated CO2 enhances rice root growth under alternate wetting and drying irrigation by involving ABA response
T2 - Evidence from the seedling stage
AU - Wang, Ke
AU - Xu, Feiyun
AU - Yuan, Wei
AU - Ding, Yexin
AU - Sun, Leyun
AU - Feng, Zhiwei
AU - Liu, Xin
AU - Xu, Weifeng
AU - Zhang, Jianhua
AU - Wang, Fei
N1 - Funding information:
We are grateful grant support from the National Key Research and Development Program of China (2022YFD1900705 and 2017YFE0118100), “5511” Collaborative and Innovative Project of Fujian Province (XTCXGC2021009), and National Natural Science Foundation of China (31761130073 and 31872169).
National Key Research and Development Program of China, Grant/ Award Number: 2022YFD1900705 and 2017YFE0118100; “5511” Collaborative and Innovative Project of Fujian Province, Grant/Award Number: XTCXGC2021009; National Natural Science Foundation of China, Grant/Award Number: 31872169 and 31761130073
Publisher copyright:
© 2022 The Authors. Food and Energy Security published by John Wiley & Sons Ltd.
PY - 2023/3
Y1 - 2023/3
N2 - The atmospheric CO2 enrichment can seriously affect rice root growth. Alternate wetting and drying (AWD) irrigation, which can also increase root growth, is a widely promoted water-saving technology for future climate, yet how elevated CO2 (eCO2) influences rice root growth under AWD remains unclear. In the present study, we examined the root growth of Yangdao 6 (YD 6) and Koshihikari (KOS) cultured under different water irrigation regimes (well-watered and AWD) and CO2 concentration (400 and 800 ppm). AWD reduced shoot dry weight of KOS compared with WW under ambient CO2 (400 ppm, aCO2), while the shoot dry weight of KOS showed no difference between WW and AWD treatments under eCO2. Additional, under aCO2, AWD did not affect the exhibited similar root dry weight, length, total surface area, and volume of YD 6 and KOS relative to WW. However, under eCO2, AWD significantly promoted the root dry weight, root length, total root surface area, and root volume of YD 6 and KOS. Furthermore, root ABA content of YD 6 and KOS was significantly higher under AWD than under WW. Then, the OsNCED3 (a key gene for ABA biosynthesis) RNAi lines were used to check the role of ABA in root growth under eCO2 with AWD conditions. The results showed that AWD increased the ABA content and root parameters of WT but not the OsNCED3 RNAi lines under eCO2. Overall, the results suggest that eCO2 can improve rice root growth under AWD by involving root ABA, which contributes to the understanding of water-saving irrigation on rice in the future climate.
AB - The atmospheric CO2 enrichment can seriously affect rice root growth. Alternate wetting and drying (AWD) irrigation, which can also increase root growth, is a widely promoted water-saving technology for future climate, yet how elevated CO2 (eCO2) influences rice root growth under AWD remains unclear. In the present study, we examined the root growth of Yangdao 6 (YD 6) and Koshihikari (KOS) cultured under different water irrigation regimes (well-watered and AWD) and CO2 concentration (400 and 800 ppm). AWD reduced shoot dry weight of KOS compared with WW under ambient CO2 (400 ppm, aCO2), while the shoot dry weight of KOS showed no difference between WW and AWD treatments under eCO2. Additional, under aCO2, AWD did not affect the exhibited similar root dry weight, length, total surface area, and volume of YD 6 and KOS relative to WW. However, under eCO2, AWD significantly promoted the root dry weight, root length, total root surface area, and root volume of YD 6 and KOS. Furthermore, root ABA content of YD 6 and KOS was significantly higher under AWD than under WW. Then, the OsNCED3 (a key gene for ABA biosynthesis) RNAi lines were used to check the role of ABA in root growth under eCO2 with AWD conditions. The results showed that AWD increased the ABA content and root parameters of WT but not the OsNCED3 RNAi lines under eCO2. Overall, the results suggest that eCO2 can improve rice root growth under AWD by involving root ABA, which contributes to the understanding of water-saving irrigation on rice in the future climate.
KW - ABA concentration
KW - CO2 concentration
KW - growth
KW - irrigation regime
KW - Rice
UR - https://www.scopus.com/inward/record.uri?eid=2-s2.0-85144326864&doi=10.1002%2ffes3.442&partnerID=40&md5=ebc94d03071dafb9f471139d998ce780
U2 - 10.1002/fes3.442
DO - 10.1002/fes3.442
M3 - Journal article
AN - SCOPUS:85144326864
SN - 2048-3694
VL - 12
JO - Food and Energy Security
JF - Food and Energy Security
IS - 2
M1 - e442
ER -
