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Erick G. Begitschke, James D. McCurdy, Te-Ming Tseng, T. Casey Barickman, Barry R. Stewart, Christian M. Baldwin, Michael P. Richard, and Maria Tomaso-Peterson

herbicide application is lacking. Therefore, research was conducted to determine the effects of preemergence herbicides commonly used on sod farms on hybrid bermudagrass root architecture and to provide some insight into the effects of these preemergence

Open access

Arthur Villordon, Jeffrey C. Gregorie, and Don LaBonte

involving the model plant Arabidopsis thaliana and well-characterized cereal crops have revealed that under conditions of low Pi availability, plants modulate root system architecture to maximize Pi uptake and positively influence yield ( Lopez

Free access

Ana Fita, Belén Picó, Antonio J. Monforte, and Fernando Nuez

The root system plays a very important role in plant development. A root system that is strong, healthy, and has an adequate architecture for the environment in which it develops provides numerous benefits to the plant, such as a greater capacity

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Gerardo H. Nunez, Hilda Patricia Rodríguez-Armenta, Rebecca L. Darnell, and James W. Olmstead

study the effect that substrate and pedigree have on root system architecture and to develop molecular markers to breed for root system architecture traits. Seeds were germinated in 3.8-L pots filled with sphagnum peatmoss (peat) in a temperature

Open access

Arthur Villordon and Jeffrey C. Gregorie

deficiency and toxicity in sweetpotato is of fundamental and practical importance in this globally important crop. One of the means that plants adapt to variation in soil nutrient availability is by altering root system architecture (RSA) (reviewed in

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Ute Albrecht, Mireia Bordas, Beth Lamb, Bo Meyering, and Kim D. Bowman

is a direct consequence of infection with CLas, often occurring before disease symptoms become apparent ( Johnson et al., 2014 ). Therefore, root architecture is likely to influence resilience of a commercial citrus tree to HLB and to other biotic or

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Ben van Hooijdonk, David Woolley, Ian Warrington, and Stuart Tustin

. Objectives of this study were to elucidate how M.9 modified scion architecture after tree grafting, the precise time when these modifications started, and the possible functional growth relationships occurring between the developing root and scion. Endogenous

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Jeffrey S. Beasley, Bruce E. Branham, and Loretta M. Ortiz-Ribbing

Trinexapac-ethyl (TE) [4-(cyclopropyl-a-hydroxy-methylene)-3,5-dioxocyclohexanecarboxylic acid ethyl ester] effects on turfgrass root architecture are not known. It has been postulated that PGR application could cause photoassimilate that is normally used for shoot growth to be funneled to root growth. This study evaluated the effects of a single TE application on kentucky bluegrass (KBG) root and shoot growth for seven weeks. Individual KBG plants were grown in a hydroponic system and harvested weekly. At each harvest, tiller height, tiller number, and color ratings were recorded. Estimates of total root length (TRL), root surface area (SA), and average root diameter were measured using the WinRhizo system. Trinexapac-ethyl reduced plant height for 4 weeks followed by a period of postinhibition growth enhancement. Trinexapac-ethyl increased tiller number over the course of the study and slightly enhanced plant color. Trinexapac-ethyl reduced TRL and SA 48% and 46% at 1 week after treatment (WAT) followed by an accelerated growth rate 1 to 4 WAT. Trinexapac-ethyl had no effect on root diameter. On a tiller basis, TE initially reduced TRL and SA 30% and 31%, respectively. Total root length per tiller and root surface area per tiller were reduced by TE treatment, but by 7 WAT, those differences were no longer significant. Initial reductions in TRL and SA per tiller may reduce tiller competitiveness for water and nutrients. Based on data for TRL and SA per tiller, shoot and root growth must be considered in total to fully understand TE effects on plant growth. Field research is needed to corroborate results from hydroponic-studies and examine the effect of various TE rates and multiple applications on turfgrass root and shoot growth.

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Arthur Villordon, Don LaBonte, Nurit Firon, and Edward Carey

Root system architecture has been referred to as an integrative result of LR initiation, morphogenesis, emergence, and growth ( Dubrovsky and Forde, 2012 ). LRs contribute to water use efficiency and facilitate the extraction of micro- and

Open access

Arthur Villordon and Christopher Clark

detached and washed before image acquisition. Root architecture measurements. Measurement of root architectural attributes followed the procedures described in prior work on the cultivar Beauregard ( Villordon et al., 2012 , 2013 , 2014 ). Intact ARs that