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Simultaneous effects of leaf irradiance and soil moisture on growth and root system architecture of novel wheat genotypes: implications for phenotyping.

Nagel KA, Bonnett D, Furbank R, Walter A, Schurr U, Watt M - J. Exp. Bot. (2015)

Bottom Line: In contrast, the other genotype showed much less plasticity and responsiveness to upper moist soil, but maintained deeper penetration of roots into the dry layer.The sum of shoot and root responses was greater when treated simultaneously to low light and low soil water, compared to each treatment alone, suggesting the value of whole plant phenotyping in response to multiple conditions for agronomic improvement.The results suggest that canopy management for increased irradiation of leaves would encourage root growth into deeper drier soil, and that genetic variation within closely related breeding lines may exist to favour surface root growth in response to irrigation or in-season rainfall.

View Article: PubMed Central - PubMed

Affiliation: CSIRO Plant Industry, GPO Box 1600, Canberra, ACT, 2601, Australia Institute of Bio- and Geosciences, IBG-2: Plant Sciences, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany k.nagel@fz-juelich.de.

No MeSH data available.


Related in: MedlinePlus

Effect of irradiation and soil moisture on (A) leaf area development and (B) total length of visible roots of wheat genotype VJ 10. Plants were exposed to control conditions (moderate light and well-watered) or to a reduction in either light (low light) or soil moisture in the bottom part of the rhizoboxes (low water), or to a combination of low light and soil moisture (low light + low water), respectively (mean value ±SE, n = 4; two-way ANOVA for repeated measures over time, (A) F12,48 = 2.07, P = 0.04; (B) F18,90 = 8.21, P < 0.001).
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Figure 3: Effect of irradiation and soil moisture on (A) leaf area development and (B) total length of visible roots of wheat genotype VJ 10. Plants were exposed to control conditions (moderate light and well-watered) or to a reduction in either light (low light) or soil moisture in the bottom part of the rhizoboxes (low water), or to a combination of low light and soil moisture (low light + low water), respectively (mean value ±SE, n = 4; two-way ANOVA for repeated measures over time, (A) F12,48 = 2.07, P = 0.04; (B) F18,90 = 8.21, P < 0.001).

Mentions: Leaf area development of the novel genotype VJ 10 was slightly but not significantly reduced when light irradiation was halved (Fig. 3A). The small light-dependent leaf area reduction was more pronounced when roots were exposed to well-watered conditions than to low soil water content. A decrease in light intensity led to a decrease in leaf area size of 26% under well-watered conditions, but only 13% under low soil moisture. Reduced light intensity was also found to reduce leaf numbers on main stem and tillers by approximately one leaf per plant (Table 2). Interestingly, the length of the second stem leaf increased by 20–30% when the light irradiation was halved, while width of the mentioned leaf declined slightly. Low soil water conditions induced marginally greater leaf growth, but this was not statistically significant, and numbers of leaves on the main stem were similar under low and high soil moisture (Table 2).


Simultaneous effects of leaf irradiance and soil moisture on growth and root system architecture of novel wheat genotypes: implications for phenotyping.

Nagel KA, Bonnett D, Furbank R, Walter A, Schurr U, Watt M - J. Exp. Bot. (2015)

Effect of irradiation and soil moisture on (A) leaf area development and (B) total length of visible roots of wheat genotype VJ 10. Plants were exposed to control conditions (moderate light and well-watered) or to a reduction in either light (low light) or soil moisture in the bottom part of the rhizoboxes (low water), or to a combination of low light and soil moisture (low light + low water), respectively (mean value ±SE, n = 4; two-way ANOVA for repeated measures over time, (A) F12,48 = 2.07, P = 0.04; (B) F18,90 = 8.21, P < 0.001).
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License 1 - License 2
Show All Figures
getmorefigures.php?uid=PMC4585422&req=5

Figure 3: Effect of irradiation and soil moisture on (A) leaf area development and (B) total length of visible roots of wheat genotype VJ 10. Plants were exposed to control conditions (moderate light and well-watered) or to a reduction in either light (low light) or soil moisture in the bottom part of the rhizoboxes (low water), or to a combination of low light and soil moisture (low light + low water), respectively (mean value ±SE, n = 4; two-way ANOVA for repeated measures over time, (A) F12,48 = 2.07, P = 0.04; (B) F18,90 = 8.21, P < 0.001).
Mentions: Leaf area development of the novel genotype VJ 10 was slightly but not significantly reduced when light irradiation was halved (Fig. 3A). The small light-dependent leaf area reduction was more pronounced when roots were exposed to well-watered conditions than to low soil water content. A decrease in light intensity led to a decrease in leaf area size of 26% under well-watered conditions, but only 13% under low soil moisture. Reduced light intensity was also found to reduce leaf numbers on main stem and tillers by approximately one leaf per plant (Table 2). Interestingly, the length of the second stem leaf increased by 20–30% when the light irradiation was halved, while width of the mentioned leaf declined slightly. Low soil water conditions induced marginally greater leaf growth, but this was not statistically significant, and numbers of leaves on the main stem were similar under low and high soil moisture (Table 2).

Bottom Line: In contrast, the other genotype showed much less plasticity and responsiveness to upper moist soil, but maintained deeper penetration of roots into the dry layer.The sum of shoot and root responses was greater when treated simultaneously to low light and low soil water, compared to each treatment alone, suggesting the value of whole plant phenotyping in response to multiple conditions for agronomic improvement.The results suggest that canopy management for increased irradiation of leaves would encourage root growth into deeper drier soil, and that genetic variation within closely related breeding lines may exist to favour surface root growth in response to irrigation or in-season rainfall.

View Article: PubMed Central - PubMed

Affiliation: CSIRO Plant Industry, GPO Box 1600, Canberra, ACT, 2601, Australia Institute of Bio- and Geosciences, IBG-2: Plant Sciences, Forschungszentrum Jülich GmbH, 52425 Jülich, Germany k.nagel@fz-juelich.de.

No MeSH data available.


Related in: MedlinePlus