ABA regulation of root growth during soil drying and recovery can involve auxin response

2021 ◽  
Author(s):  
Qian Zhang ◽  
Wei Yuan ◽  
Qianwen Wang ◽  
Yiying Cao ◽  
Feiyun Xu ◽  
...  
Keyword(s):  
Root Growth ◽  
Soil Drying ◽  
Auxin Response

scholarly journals miR390, Arabidopsis TAS3 tasiRNAs, and Their AUXIN RESPONSE FACTOR Targets Define an Autoregulatory Network Quantitatively Regulating Lateral Root Growth

2010 ◽  
Vol 22 (4) ◽  
pp. 1104-1117 ◽  
Author(s):  
Elena Marin ◽  
Virginie Jouannet ◽  
Aurélie Herz ◽  
Annemarie S. Lokerse ◽  
Dolf Weijers ◽  
...  
Keyword(s):  
Root Growth ◽  
Lateral Root ◽  
Auxin Response Factor ◽  
Response Factor ◽  
Auxin Response

Abscisic acid mediates barley rhizosheath formation under mild soil drying by promoting root hair growth and auxin response

2021 ◽  
Author(s):  
Yingjiao Zhang ◽  
Feiyun Xu ◽  
Yexin Ding ◽  
Huan Du ◽  
Qian Zhang ◽  
...  
Keyword(s):  
Abscisic Acid ◽  
Root Hair ◽  
Hair Growth ◽  
Soil Drying ◽  
Auxin Response ◽  
Root Hair Growth

Root Response to Water Stress in Rainfed Lowland Rice

1990 ◽  
Vol 26 (3) ◽  
pp. 287-296 ◽  
Author(s):  
M. Thangaraj ◽  
J. C. O'Toole ◽  
S. K. De Datta
Keyword(s):  
Root Growth ◽  
Root Length ◽  
Root Length Density ◽  
Soil Layer ◽  
Sprinkler Irrigation ◽  
Mechanical Impedance ◽  
Field Studies ◽  
Soil Drying ◽  
Rainfed Lowland ◽  
Response To Water

SUMMARYThe relation between soil mechanical impedance as a result of soil drying, and root system growth (mass and length density) of rice was investigated in greenhouse and field studies. In a greenhouse experiment, soil drying for 16 days increased mechanical impedance in the 0–20 cm soil layer from near 0 to 2.5 MPa, and decreased root growth by 47% compared to the continuously flooded control. Root length density decreased with decreasing soil moisture and increasing soil mechanical impedance. In a lowland field experiment using a sprinkler irrigation gradient treatment for 19 days during the vegetative growth stage, soil mechanical impedance as low as 0.01 MPa inhibited root growth while values greater than 0.3–0.5 MPa decreased root growth and extension by 75%. The relative loss of potential root growth was continued after reflooding. Root length density, measured at flowering, was linearly related to yield.

Effect of an auxin biosynthesis inhibitor, p-phenoxyphenyl boronic acid, on auxin biosynthesis and development in rice

2021 ◽  
Vol 85 (3) ◽  
pp. 510-519
Author(s):  
Mayu Watanabe ◽  
Masaru Shigihara ◽  
Yuna Hirota ◽  
Shin Takato ◽  
Akiko Sato ◽  
...  
Keyword(s):  
Root Growth ◽  
Boronic Acid ◽  
Root Meristem ◽  
Specific Inhibitor ◽  
Auxin Biosynthesis ◽  
Rice Seedlings ◽  
Auxin Response ◽  
Key Enzyme ◽  
Indole 3 Acetic Acid

ABSTRACT p-Phenoxyphenyl boronic acid (PPBo) is a specific inhibitor of auxin biosynthesis in Arabidopsis. We examined the inhibitory activity of PPBo in rice. The activity of OsYUCCA, a key enzyme for auxin biosynthesis, was inhibited by PPBo in vitro. The endogenous indole-3-acetic acid (IAA) level and the expression levels of auxin-response genes were significantly reduced in PPBo-treated rice seedlings, which showed typical auxin-deficiency phenotypes. Seminal root growth was promoted by 1 µM PPBo, which was reversed by co-treatment of IAA and PPBo. By contrast, the inhibition of root growth by 10 µM PPBo was not recovered by IAA. The root meristem morphology and cell division were restored by IAA at 60 µM, but that concentration may be too high to support root growth. In conclusion, PPBo is an inhibitor of auxin biosynthesis that targets YUCCA in rice.

The effect of soil water on root production of peach trees in summer

1975 ◽  
Vol 26 (1) ◽  
pp. 173 ◽  
Author(s):  
D Richards ◽  
B Cockroft
Keyword(s):  
Root Growth ◽  
Water Supply ◽  
Soil Water ◽  
Field Experiments ◽  
Surface Soil ◽  
Root Production ◽  
Drying Rate ◽  
Soil Drying ◽  
High Concentration ◽  
Irrigation Frequency

The effect of soil water supply on peach root production in summer was studied in the Goulburn Valley area of northern Victoria. Under commercial irrigation practice roots do not grow in summer. Field experiments showed that when the soil was kept moist by frequent irrigation (every 3–4 days), the concentration of roots in the surface soil nearly doubled in a single season. Furthermore, observation through glass plates showed that this enhanced root growth occurred throughout summer. When roots were kept inactive in dry soil until midsummer and thereafter irrigated frequently, they immediately responded and grew rapidly. The increased root growth did not impair fruit production. In a glasshouse experiment, with glass-fronted chambers, a relationship between root elongation, root concentration and the drying rate of the soil was found. Each experiment supported the hypothesis that soil drying rate determines the growth of roots in the surface soil. Where there was a high concentration of roots, a low irrigation frequency, and high transpiration, the rate of soil drying was rapid and roots grew slowly. It is suggested that manipulation of root growth by regulation of soil water supply may be an important method of studying root-top interactions.

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