Research output: Contribution to Journal/Magazine › Literature review › peer-review
Research output: Contribution to Journal/Magazine › Literature review › peer-review
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TY - JOUR
T1 - Common and specific responses to availability of mineral nutrients and water
AU - Kudoyarova, Guzel R.
AU - Dodd, Ian C.
AU - Veselov, Dmitry S.
AU - Rothwell, Shane A.
AU - Veselov, Stanislav Yu.
PY - 2015/4
Y1 - 2015/4
N2 - Changes in resource (mineral nutrients and water) availability, due to their heterogeneous distribution in space and time, affect plant development. Plants need to sense these changes to optimize growth and biomass allocation by integrating root and shoot growth. Since a limited supply of water or nutrients can elicit similar physiological responses (the relative activation of root growth at the expense of shoot growth), similar underlying mechanisms may affect perception and acquisition of either nutrients or water. This review compares root and shoot responses to availability of different macronutrients and water. Attention is given to the roles of root-to-shoot signalling and shoot-to-root signalling, with regard to coordinating changes in root and shoot growth and development. Involvement of plant hormones in regulating physiological responses such as stomatal and hydraulic conductance is revealed by measuring the effects of resource availability on phytohormone concentrations in roots and shoots, and their flow between roots and shoots in xylem and phloem saps. More specific evidence can be obtained by measuring the physiological responses of genotypes with altered hormone responses or concentrations. We discuss the similarity and diversity of changes in shoot growth, allocation to root growth, and root architecture under changes in water, nitrate, and phosphorus availability, and the possible involvement of abscisic acid, indole-acetic acid, and cytokinin in their regulation. A better understanding of these mechanisms may contribute to better crop management for efficient use of these resources and to selecting crops for improved performance under suboptimal soil conditions.
AB - Changes in resource (mineral nutrients and water) availability, due to their heterogeneous distribution in space and time, affect plant development. Plants need to sense these changes to optimize growth and biomass allocation by integrating root and shoot growth. Since a limited supply of water or nutrients can elicit similar physiological responses (the relative activation of root growth at the expense of shoot growth), similar underlying mechanisms may affect perception and acquisition of either nutrients or water. This review compares root and shoot responses to availability of different macronutrients and water. Attention is given to the roles of root-to-shoot signalling and shoot-to-root signalling, with regard to coordinating changes in root and shoot growth and development. Involvement of plant hormones in regulating physiological responses such as stomatal and hydraulic conductance is revealed by measuring the effects of resource availability on phytohormone concentrations in roots and shoots, and their flow between roots and shoots in xylem and phloem saps. More specific evidence can be obtained by measuring the physiological responses of genotypes with altered hormone responses or concentrations. We discuss the similarity and diversity of changes in shoot growth, allocation to root growth, and root architecture under changes in water, nitrate, and phosphorus availability, and the possible involvement of abscisic acid, indole-acetic acid, and cytokinin in their regulation. A better understanding of these mechanisms may contribute to better crop management for efficient use of these resources and to selecting crops for improved performance under suboptimal soil conditions.
KW - Mineral nutrients
KW - water deficit
KW - intracellular and long-distance signalling
KW - abscisic acid
KW - auxin
KW - cytokinins
KW - sugars
KW - growth
KW - root architecture
KW - ROOT-SYSTEM ARCHITECTURE
KW - PHOSPHATE STARVATION RESPONSES
KW - AFFINITY NITRATE TRANSPORTER
KW - MAIZE ZEA-MAYS
KW - ABSCISIC-ACID
KW - LONG-DISTANCE
KW - ARABIDOPSIS-THALIANA
KW - SIGNALING PATHWAYS
KW - GENE-EXPRESSION
KW - LEAF EXPANSION
U2 - 10.1093/jxb/erv017
DO - 10.1093/jxb/erv017
M3 - Literature review
VL - 66
SP - 2133
EP - 2144
JO - Journal of Experimental Botany
JF - Journal of Experimental Botany
SN - 0022-0957
IS - 8
ER -