+ Resolve Article
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter

+ Translate
+ Subscribe to Site Feed
GeoScience Most Shared ContentMost Shared Content

Alternate partial root-zone irrigation reduces bundle-sheath cell leakage to CO2 and enhances photosynthetic capacity in maize leaves

, : Alternate partial root-zone irrigation reduces bundle-sheath cell leakage to CO2 and enhances photosynthetic capacity in maize leaves. Journal of Experimental Botany 63(3): 1145-1153

The physiological basis for the advantage of alternate partial root-zone irrigation (PRI) over common deficit irrigation (DI) in improving crop water use efficiency (WUE) remains largely elusive. Here leaf gas exchange characteristics and photosynthetic CO2–response and light–response curves for maize (Zea mays L.) leaves exposed to PRI and DI were analysed under three N-fertilization rates, namely 75, 15, and 3 mg N kg–1 soil. Measurements of net photosynthetic rate (An) and stomatal conductance (gs) showed that, across the three N-fertilization rates, the intrinsic WUE was significantly higher in PRI than in DI leaves. Analysis of the CO2–response curve revealed that both carboxylation efficiency (CE) and the CO2-saturated photosynthetic rate (Asat) were significantly higher in PRI than in DI leaves across the three N-fertilization rates; whereas the N-fertilization rates did not influence the shape of the curves. The enhanced CE and Asat in the PRI leaves was accompanied by significant decreases in carbon isotope discrimination (13C) and bundle-sheath cell leakiness to CO2 (). Analysis of the light–response curve indicated that, across the three N-fertilization rates, the quantum yield (α) and light-saturated gross photosynthetic rate (Amax) were identical for the two irrigation treatments; whilst the convexity () of the curve was significantly greater in PRI than in DI leaves, which coincided with the greater CE and Asat derived from the CO2–response curve at a photosynthetic photon flux density of 15 μmol m–2 s–1. Collectively, the results suggest that, in comparison with the DI treatment, PRI improves photosynthetic capacity parameters CE, Asat, and of maize leaves and that contributes to the greater intrinsic WUE in those plants.


PMID: 22121199

DOI: 10.1093/jxb/err331

Other references

Janssen, J.; Pankhurst, N.W.; Harbison, G.R.chard, 1992: Swimming and body orientation of Notolepis rissoi in relation to lateral line and visual function. When observed from a submersible, the mesopelagic paralepidid Notolepis rissoi (Pisces:Paralepididae) will hover head up with the body at about 45 degree . The fish's swimming motion is restricted to the extreme caudal region with most of the...

Mettler, A.E.; Shivik, J.A., 2007: Dominance and neophobia in coyote (Canis latrans) breeding pairs. Previous research suggests that within social animals, subordinate individuals are less neophobic than dominant individuals. We investigated the effect of social status on neophobic responses using 10 captive coyote breeding pairs. Social status w...

Pothmann, R., 1991: Headache and facial neuralgia in pediatrics. Seithel, R [Editor] Neuraltherapie : 132-140

Alvinerie Jacques; Degot Bernadette; Leveque Paul; Vigneaux Michel, 1966: Study of the tritium activity of the mont-cenis drainage basin. Comptes Rendus Hebdomadaires des Seances de l'Academie des Sciences, Serie D: Sciences Naturelles 262(1): 32-35

Scaramuzzi, G.; Corte, A., 1957: Banded chlorosis of flowering cherry. Ornamental cherry, variety Schimidsu Sakura, was not seriously affected by the virus causing banded chlorosis, but could be a reservoir of infection for other flowering cherries, mazzard, peach, plum and myrobalan. Line pattern of plum and myrobal...

Moens, B.; Muller, C.; van Noorden, L.; Franěk, M.; Celie, B.; Boone, J.; Bourgois, J.; Leman, M., 2015: Encouraging spontaneous synchronisation with D-Jogger, an adaptive music player that aligns movement and music. In this study we explore how music can entrain human walkers to synchronise to the musical beat without being instructed to do so. For this, we use an interactive music player, called D-Jogger, that senses the user's walking tempo and phase....

Rao, K.N.rasimha; Rao, N.J.naki-Rama; Girisham, S.; Reddy, S.M., 2007: Haematological changes in chicks under the influence of zearalenone. Haematological changes under the influence of zearalenone produced by Fusarium moniliforme was investigated. Zearalenone, besides causing dose dependent weight loss in chicks was responsible for decrease in serum protein, calcium, urea, albumins a...

Noetzli, J.; Gruber, S.; Dall'Amico, M.; Endrizzi, S., 2009: Coupling the models GEOtop 2-D surface and COMSOL 3-D subsurface in a case study for the Swiss borehole site Schilthorn. Geophysical Research Abstracts 11

Okumiya, K.; Matsubayashi, K.; Wada, T.; Osaki, Y.; Doi, Y.; Ozawa, T., 1997: J-curve relation between blood pressure and decline in cognitive function in older people living in community, Japan. Journal of the American Geriatrics Society 45(8): 1032-1033

Chod, J., 1973: The most frequent causes of carnation wilt. These include Fusarium oxysporum f.sp. dianthi, Phialophora cinerescens, Heterosporium echinulatum [Didymellina dianthi], Uromyces dianthi and Alternaria dianthi. Spraying with 0.25% dithane or 0.3% perocin was effective against U. dianthi.