Temperature-sensitive biochemical 18 O-fractionation and humidity-dependent attenuation factor are needed to predict δ18 O of cellulose from leaf water in a grassland ecosystem.
Temperature-sensitive biochemical 18 O-fractionation and humidity-dependent attenuation factor are needed to predict δ18 O of cellulose from leaf water in a grassland ecosystem.
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需要温度敏感的生化 18 O 分馏和湿度相关的衰减因子来预测草原生态系统中叶水中纤维素的 δ18 O
DOI:
10.1111/nph.17111
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发表时间:
2021
期刊:
影响因子:
--
通讯作者:
Schnyder H
中科院分区:
文献类型:
--
作者:
Hirl RT;Ogée J;Ostler U;Schäufele R;Baca Cabrera JC;Schleip I;Wingate L;Schnyder H
We explore here our mechanistic understanding of the environmental and physiological processes that determine the oxygen isotope composition of leaf cellulose (δ18Ocellulose) in a drought‐prone, temperate grassland ecosystem.A new allocation‐and‐growth model was designed and added to an18O‐enabled soil–vegetation–atmosphere transfer model (MuSICA) to predict seasonal (April–October) and multi‐annual (2007–2012) variation of δ18Ocelluloseand18O‐enrichment of leaf cellulose (Δ18Ocellulose) based on the Barbour–Farquhar model.Modelled δ18Ocelluloseagreed best with observations when integrated overc.400 growing‐degree‐days, similar to the average leaf lifespan observed at the site. Over the integration time, air temperature ranged from 7 to 22°C and midday relative humidity from 47 to 73%. Model agreement with observations of δ18Ocellulose(R2= 0.57) and Δ18Ocellulose(R2= 0.74), and their negative relationship with canopy conductance, was improved significantly when both the biochemical18O‐fractionation between water and substrate for cellulose synthesis (εbio, range 26–30‰) was temperature‐sensitive, as previously reported for aquatic plants and heterotrophically grown wheat seedlings, and the proportion of oxygen in cellulose reflecting leaf water18O‐enrichment (1 –pexpx, range 0.23–0.63) was dependent on air relative humidity, as observed in independent controlled experiments with grasses.Understanding physiological information in δ18Ocelluloserequires quantitative knowledge of climatic effects onpexpxandεbio.
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DOI:
10.1111/nph.12114
发表时间:
2013
期刊:
The New phytologist
影响因子:
--
作者:
Royles J
通讯作者:
Royles J
DOI:
10.1111/nph.13800
发表时间:
2016
期刊:
The New phytologist
影响因子:
--
作者:
U. Ostler;Inga Schleip;Fernando Alfredo Lattanzi;H. Schnyder
通讯作者:
H. Schnyder
影响因子:
3.1
作者:
G. Wohlfahrt;M. Bahn;I. Horák;U. Tappeiner;A. Cernusca
通讯作者:
A. Cernusca
影响因子:
7.3
作者:
Liu, Hai Tao;Gong, Xiao Ying;Schnyder, Hans
通讯作者:
Schnyder, Hans
影响因子:
3.8
作者:
Inga Schleip;Fernando Alfredo Lattanzi;H. Schnyder
通讯作者:
Inga Schleip;Fernando Alfredo Lattanzi;H. Schnyder