Exogenous nitrate induces root branching and inhibits primary root growth in Capsicum chinense Jacq.

2011 ◽  
Vol 49 (12) ◽  
pp. 1456-1464 ◽  
Author(s):  
Teresita de Jesús Celis-Arámburo ◽  
Mildred Carrillo-Pech ◽  
Lizbeth A. Castro-Concha ◽  
María de Lourdes Miranda-Ham ◽  
Manuel Martínez-Estévez ◽  
...  
Keyword(s):  
Root Growth ◽  
Primary Root ◽  
Capsicum Chinense ◽  
Root Branching ◽  
Primary Root Growth

Natural variation in primary root growth and K+ retention in roots of habanero pepper (Capsicum chinense) under salt stress

2016 ◽  
Vol 43 (12) ◽  
pp. 1114 ◽  
Author(s):  
Emanuel Bojórquez-Quintal ◽  
Nancy Ruiz-Lau ◽  
Ana Velarde-Buendía ◽  
Ileana Echevarría-Machado ◽  
Igor Pottosin ◽  
...  
Keyword(s):  
Salt Stress ◽  
Root Growth ◽  
Natural Variation ◽  
Primary Root ◽  
Capsicum Chinense ◽  
Pharmacological Agents ◽  
Habanero Pepper ◽  
Nacl Concentration ◽  
Primary Root Growth ◽  
Chichen Itza

In this work, we analysed the natural variation in mechanisms for protection against salt stress in pepper varieties (Capsicum chinense Jacq. cv. Rex, Chichen-Itza and Naranja and Capsicum annuum L. cv. Padron), considering primary root growth and viability of the post-stressed seedlings. NaCl-induced K+ and H+ efflux in roots was also studied by ion-selective microelectrodes under application of pharmacological agents. In these pepper varieties, the magnitude of the K+ leakage in the roots positively correlated with growth inhibition of the primary root in the presence of NaCl, with Rex variety showing a higher level of tolerance than Chichen-Itza. The K+ leakage and the activity of the H+ pump in the roots were dependent on the NaCl concentration. Pharmacological analysis indicated that the NaCl-induced K+ leakage was mediated by TEA+-sensitive KOR channels but not by NSCC channels. In addition, we present evidence for the possible participation of proline, and a Na+-insensitive HAK K+ transporter expressed in habanero pepper roots for maintaining K+ homeostasis under salt stress conditions.

scholarly journals 2,4-Diacetylphloroglucinol Alters Plant Root Development

2008 ◽  
Vol 21 (10) ◽  
pp. 1349-1358 ◽  
Author(s):  
Jessica N. Brazelton ◽  
Emily E. Pfeufer ◽  
Teresa A. Sweat ◽  
Brian B. McSpadden Gardener ◽  
Catharina Coenen
Keyword(s):  
Root Growth ◽  
Plant Root ◽  
Primary Root ◽  
Luciferase Reporter ◽  
Root Production ◽  
Inhibitory Effects ◽  
Luciferase Reporter Gene ◽  
Root Branching ◽  
Tomato Seedlings ◽  
Primary Root Growth

Pseudomonas fluorescens isolates containing the phlD gene can protect crops from root pathogens, at least in part through production of the antibiotic 2,4-diacetylphloroglucinol (DAPG). However, the action mechanisms of DAPG are not fully understood, and effects of this antibiotic on host root systems have not been characterized in detail. DAPG inhibited primary root growth and stimulated lateral root production in tomato seedlings. Roots of the auxin-resistant diageotropica mutant of tomato demonstrated reduced DAPG sensitivity with regards to inhibition of primary root growth and induction of root branching. Additionally, applications of exogenous DAPG, at concentrations previously found in the rhizosphere of plants inoculated with DAPG-producing pseudomonads, inhibited the activation of an auxin-inducible GH3 promoter∷luciferase reporter gene construct in transgenic tobacco hypocotyls. In this model system, supernatants of 17 phlD+ P. fluorescens isolates had inhibitory effects on luciferase activity similar to synthetic DAPG. In addition, a phlD– mutant strain, unable to produce DAPG, demonstrated delayed inhibitory effects compared with the parent wild-type strain. These results indicate that DAPG can alter crop root architecture by interacting with an auxin-dependent signaling pathway.

scholarly journals Developmental Distribution of the Plasma Membrane-Enriched Proteome in the Maize Primary Root Growth Zone

2013 ◽  
Vol 4 ◽  
Author(s):  
Zhe Zhang ◽  
Priyamvada Voothuluru ◽  
Mineo Yamaguchi ◽  
Robert E. Sharp ◽  
Scott C. Peck
Keyword(s):  
Plasma Membrane ◽  
Root Growth ◽  
Primary Root ◽  
Growth Zone ◽  
Primary Root Growth

scholarly journals The Arabidopsis bZIP11 transcription factor links low-energy signalling to auxin-mediated control of primary root growth

PLoS Genetics ◽  
2017 ◽  
Vol 13 (2) ◽  
pp. e1006607 ◽  
Author(s):  
Christoph Weiste ◽  
Lorenzo Pedrotti ◽  
Jebasingh Selvanayagam ◽  
Prathibha Muralidhara ◽  
Christian Fröschel ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Root Growth ◽  
Primary Root ◽  
Low Energy ◽  
Primary Root Growth

scholarly journals Temperature and pH of the nutrient solution on wheat primary root growth

2004 ◽  
Vol 61 (3) ◽  
pp. 313-318 ◽  
Author(s):  
Carlos Eduardo de Oliveira Camargo ◽  
Antonio Wilson Penteado Ferreira Filho ◽  
Marcus Vinicius Salomon
Keyword(s):  
Root Growth ◽  
Nutrient Solution ◽  
Primary Root ◽  
Growth Period ◽  
Triticum Aestivum L ◽  
Solution Temperature ◽  
Stages Of Development ◽  
Primary Root Growth ◽  
Temperature And Growth ◽  
Nutrient Solutions

Primary root growth is very important for wheat (Triticum aestivum L.) crop in upland conditions in the State of São Paulo. Fourteen wheat genotypes (mutant lines and cultivars) were evaluated for primary root growth during 7 and 15 days of development in complete and aerated nutrient solutions, in the laboratory. In the first experiment, solutions with three pH values (4.0, 5.0 and 6.0) at constant temperature (24 ± 1°C), and in the second experiment, solutions with the same pH (4.0) but with three temperatures (18°C ± 1°C, 24°C ± 1°C and 30°C ± 1°C) were used. High genetic variability was observed among the evaluated genotypes in relation to primary root growth in the first stages of development in nutrient solutions independent of pH, temperature and growth period. Genotypes 6 (BH-1146) and 13 (IAC-17), tolerant to Al3+ showed genetic potential for root growth in the first stages of development (7 and 15 days), regardless of nutrient solution temperature and pH. Genotypes 14 (IAC-24 M), 15 (IAC-24), 17 (MON"S" / ALD "S") ´ IAC-24 M2, 18 (MON"S" / ALD "S") ´ IAC-24 M3 and 24 (KAUZ"S" / IAC-24 M3), tolerant to Al3+, showed reduced root growth under the same conditions.

Apical meristem exhaustion during determinate primary root growth in the moots koom 1 mutant of Arabidopsis thaliana

Planta ◽  
2011 ◽  
Vol 234 (6) ◽  
pp. 1163-1177 ◽  
Author(s):  
Alejandra Hernández-Barrera ◽  
Yamel Ugartechea-Chirino ◽  
Svetlana Shishkova ◽  
Selene Napsucialy-Mendivil ◽  
Aleš Soukup ◽  
...  
Keyword(s):  
Arabidopsis Thaliana ◽  
Root Growth ◽  
Apical Meristem ◽  
Primary Root ◽  
Primary Root Growth
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