Diurnal oscillation in the intercellular CO2 concentration of spring wheat under the semiarid conditions

Title:

Diurnal oscillation in the intercellular CO2 concentration of spring wheat under the semiarid conditions

Creator:

Deng, Xi-ping, Shan, Lun, Ma, Yong-qing, and Inanaga, Shinobu

Identifier:

https://cdk.lib.cas.cz/client/handle/uuid:ff4d40ae-b07f-4266-aa38-2357f47b291d
uuid:ff4d40ae-b07f-4266-aa38-2357f47b291d
issn:0300-3604
doi:10.1023/A:1007253428312

Subject:

net photosynthetic rate, soil and athmospheric drought, stomatal conductance, and Triticum aestivum

Type:

model:article and TEXT

Format:

bez média and svazek

Description:

Yields of wheat in semiarid and arid zones are limited by drought, and water condition is very important at each stage of development. Studies carried out at Loess Plateau in the northwestern part of China indicated that yield of spring wheat (Triticum aestivum L.) cv. Dingxi 81-392 was reduced by 41% when subjected to water stress. The effects of two water regimes on net photosynthetic rate (PN), stomatal conductance (gs), and intercellular CO2 concentration (Ci) were investigated at the jointing, booting, anthesis, and grain filling stages. Low soil moisture in comparison to adequate one had invariably reduced PN during the diurnal variations at the four growth stages. PN and gs in both soil moisture regimes was maximally reduced at midday. Ci and the stomatal limitation fluctuated remarkably during photosynthesis midday depression processes, especially at the grain filling stage. Hence atmospheric drought at midday was one of the direct causes inducing stomata closure and the gs depression, but it was beneficial for maintaining stable intrinsic water use efficiency. Fluctuation in Ci implicated that non-stomatal limitation also plays an important role during the period of photosynthesis midday depression. Consequently stomatal and/or non-stomatal limitation are the possible cause of the midday photosynthesis decline. and Xi-ping Deng ... [et al.].

Language:

Multiple languages

Rights:

http://creativecommons.org/licenses/by-nc-sa/4.0/
policy:public

Coverage:

187-192

Source:

Photosynthetica | 2000 Volume:38 | Number:2

Harvested from:

CDK

Metadata only:

false