Limits...
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 on VJ 10 and VJ 30 wheat genotypes. Ratio between plants exposed to moderate light and moderate soil moisture conditions and the other three treatment combinations for root length in (A, C) the top and (B, D) bottom part of the rhizoboxes. Values prior to plants exposed to control conditions (moderate light and well-watered) were set to 100% (mean value ±SE, n = 4, two-way ANOVA for repeated measures over time, (A) F12,72 = 9.14, P < 0.001; (B) F12,108 = 1.03, P > 0.05; (C) F12,72 = 2.16, P < 0.05; (D) F12,108 = 0.12, P > 0.05; (E) F12,72 = 1.75, P > 0.05; (F) F12,108 = 1.33, P > 0.05).
© Copyright Policy - creative-commons
Related In: Results  -  Collection

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

Figure 9: Effect of irradiation and soil moisture on root growth partitioning on VJ 10 and VJ 30 wheat genotypes. Ratio between plants exposed to moderate light and moderate soil moisture conditions and the other three treatment combinations for root length in (A, C) the top and (B, D) bottom part of the rhizoboxes. Values prior to plants exposed to control conditions (moderate light and well-watered) were set to 100% (mean value ±SE, n = 4, two-way ANOVA for repeated measures over time, (A) F12,72 = 9.14, P < 0.001; (B) F12,108 = 1.03, P > 0.05; (C) F12,72 = 2.16, P < 0.05; (D) F12,108 = 0.12, P > 0.05; (E) F12,72 = 1.75, P > 0.05; (F) F12,108 = 1.33, P > 0.05).

Mentions: In spite of differences in root partitioning in control conditions, both wheat genotypes showed a similar response under low light conditions: an inhibition of root extension rates in upper as well as deeper substrate layers (Fig. 9). However, VJ 30 plants exhibited a stronger growth reduction due to light changes in the top part of the rhizobox than VJ 10 plants (VJ 30: 33% versus VJ 10: 36%). In contrast to that, low light inhibited the root growth of VJ 10 plants in the bottom part of the rhizobox 25% more than it did in VJ 30 plants in the same substrate layer.


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 on VJ 10 and VJ 30 wheat genotypes. Ratio between plants exposed to moderate light and moderate soil moisture conditions and the other three treatment combinations for root length in (A, C) the top and (B, D) bottom part of the rhizoboxes. Values prior to plants exposed to control conditions (moderate light and well-watered) were set to 100% (mean value ±SE, n = 4, two-way ANOVA for repeated measures over time, (A) F12,72 = 9.14, P < 0.001; (B) F12,108 = 1.03, P > 0.05; (C) F12,72 = 2.16, P < 0.05; (D) F12,108 = 0.12, P > 0.05; (E) F12,72 = 1.75, P > 0.05; (F) F12,108 = 1.33, P > 0.05).
© Copyright Policy - creative-commons
Related In: Results  -  Collection

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

Figure 9: Effect of irradiation and soil moisture on root growth partitioning on VJ 10 and VJ 30 wheat genotypes. Ratio between plants exposed to moderate light and moderate soil moisture conditions and the other three treatment combinations for root length in (A, C) the top and (B, D) bottom part of the rhizoboxes. Values prior to plants exposed to control conditions (moderate light and well-watered) were set to 100% (mean value ±SE, n = 4, two-way ANOVA for repeated measures over time, (A) F12,72 = 9.14, P < 0.001; (B) F12,108 = 1.03, P > 0.05; (C) F12,72 = 2.16, P < 0.05; (D) F12,108 = 0.12, P > 0.05; (E) F12,72 = 1.75, P > 0.05; (F) F12,108 = 1.33, P > 0.05).
Mentions: In spite of differences in root partitioning in control conditions, both wheat genotypes showed a similar response under low light conditions: an inhibition of root extension rates in upper as well as deeper substrate layers (Fig. 9). However, VJ 30 plants exhibited a stronger growth reduction due to light changes in the top part of the rhizobox than VJ 10 plants (VJ 30: 33% versus VJ 10: 36%). In contrast to that, low light inhibited the root growth of VJ 10 plants in the bottom part of the rhizobox 25% more than it did in VJ 30 plants in the same substrate layer.

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