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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 root growth partitioning: root length of wheat genotype VJ 10 plants in the (A) top and (B) bottom part of the rhizoboxes. 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) F18,84 = 12.04, P = 0.01; (B) F18,84 = 8.66, P < 0.001).
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Figure 5: Effect of irradiation and soil moisture on root growth partitioning: root length of wheat genotype VJ 10 plants in the (A) top and (B) bottom part of the rhizoboxes. 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) F18,84 = 12.04, P = 0.01; (B) F18,84 = 8.66, P < 0.001).

Mentions: As shown in Fig. 1, rhizoboxes were filled with well-watered soil in the top 10cm, but had either low or high soil water content in the bottom part. The soil moisture profile changed root partitioning between the top and bottom parts of the rhizoboxes. When the leaves were exposed to low light, the root length of the main axes and lateral roots were shorter in the top soil, which was kept under well-watered conditions (Fig. 5A). This low-light-induced reduction, however, was more pronounced (43%) if the lower compartment soil was well-watered. If the lower compartment was dry, low light around the leaves reduced root length in the top soil less, by only 17%.


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 root growth partitioning: root length of wheat genotype VJ 10 plants in the (A) top and (B) bottom part of the rhizoboxes. 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) F18,84 = 12.04, P = 0.01; (B) F18,84 = 8.66, 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 5: Effect of irradiation and soil moisture on root growth partitioning: root length of wheat genotype VJ 10 plants in the (A) top and (B) bottom part of the rhizoboxes. 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) F18,84 = 12.04, P = 0.01; (B) F18,84 = 8.66, P < 0.001).
Mentions: As shown in Fig. 1, rhizoboxes were filled with well-watered soil in the top 10cm, but had either low or high soil water content in the bottom part. The soil moisture profile changed root partitioning between the top and bottom parts of the rhizoboxes. When the leaves were exposed to low light, the root length of the main axes and lateral roots were shorter in the top soil, which was kept under well-watered conditions (Fig. 5A). This low-light-induced reduction, however, was more pronounced (43%) if the lower compartment soil was well-watered. If the lower compartment was dry, low light around the leaves reduced root length in the top soil less, by only 17%.

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