Auxin fluxes in the root apex co-regulate gravitropism and lateral root initiation

被引:114
作者
Lucas, M. [1 ,2 ]
Godin, C. [2 ]
Jay-Allemand, C. [3 ]
Laplaze, L. [1 ]
机构
[1] Equipe Rhizogenese, Agro M INRA IRD UM2, IRD, UMR DIA PC, F-34394 Montpellier 5, France
[2] INRA, UMR, DAP, Agro M Cirad INRIA INRA UM2, F-34398 Montpellier, France
[3] Univ Montpellier 2, Agro M INRA IRD UM2, UMR DIA PC, Equipe Rhizogenese,Lab Biochim & Physiol Vegetale, F-34095 Montpellier 5, France
关键词
AUX1; auxin transport; AXR3; GAL4; pericycle; root meristem;
D O I
10.1093/jxb/erm171
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Root architecture plays an important role in water and nutrient acquisition and in the ability of the plant to adapt to the soil. Lateral root development is the main determinant of the shape of the root system and is controlled by external factors such as nutrient concentration. Here it is shown that lateral root initiation and root gravitropism, two processes that are regulated by auxin, are co-regulated in Arabidopsis. A mathematical model was generated that can predict the effects of gravistimulations on lateral root initiation density and suggests that lateral root initiation is controlled by an inhibitory fields mechanism. Moreover, gene transactivation experiments suggest a mechanism involving a single auxin transport route for both responses. Finally, co-regulation may offer a selective advantage by optimizing soil exploration as supported by a simple quantitative analysis.
引用
收藏
页码:55 / 66
页数:12
相关论文
共 29 条
[1]   Local, efflux-dependent auxin gradients as a common module for plant organ formation [J].
Benková, E ;
Michniewicz, M ;
Sauer, M ;
Teichmann, T ;
Seifertová, D ;
Jürgens, G ;
Friml, J .
CELL, 2003, 115 (05) :591-602
[2]   Shoot-derived auxin is essential for early lateral root emergence in Arabidopsis seedlings [J].
Bhalerao, RP ;
Eklöf, J ;
Ljung, K ;
Marchant, A ;
Bennett, M ;
Sandberg, G .
PLANT JOURNAL, 2002, 29 (03) :325-332
[3]   The PIN auxin efflux facilitator network controls growth and patterning in Arabidopsis roots [J].
Blilou, I ;
Xu, J ;
Wildwater, M ;
Willemsen, V ;
Paponov, I ;
Friml, J ;
Heidstra, R ;
Aida, M ;
Palme, K ;
Scheres, B .
NATURE, 2005, 433 (7021) :39-44
[4]   Auxin transport promotes Arabidopsis lateral root initiation [J].
Casimiro, I ;
Marchant, A ;
Bhalerao, RP ;
Beeckman, T ;
Dhooge, S ;
Swarup, R ;
Graham, N ;
Inzé, D ;
Sandberg, G ;
Casero, PJ ;
Bennett, M .
PLANT CELL, 2001, 13 (04) :843-852
[5]   Dissecting Arabidopsis lateral root development [J].
Casimiro, I ;
Beeckman, T ;
Graham, N ;
Bhalerao, R ;
Zhang, HM ;
Casero, P ;
Sandberg, G ;
Bennett, MJ .
TRENDS IN PLANT SCIENCE, 2003, 8 (04) :165-171
[6]   Auxin-dependent regulation of lateral root positioning in the basal meristem of Arabidopsis [J].
De Smet, Ive ;
Tetsumura, Takuya ;
De Rybel, Bert ;
Frey, Nicolas Frei dit ;
Laplaze, Laurent ;
Casimiro, Ilda ;
Swarup, Ranjan ;
Naudts, Mirande ;
Vanneste, Steffen ;
Audenaert, Dominique ;
Inze, Dirk ;
Bennett, Malcolm J. ;
Beeckman, Tom .
DEVELOPMENT, 2007, 134 (04) :681-690
[7]   Lateral root initiation or the birth of a new meristem [J].
De Smet, Ive ;
Vanneste, Steffen ;
Inze, Dirk ;
Beeckman, Tom .
PLANT MOLECULAR BIOLOGY, 2006, 60 (06) :871-887
[8]   Phyllotaxis as a dynamical self organizing process .1. The spiral modes resulting from time-periodic iterations [J].
Douady, S ;
Couder, Y .
JOURNAL OF THEORETICAL BIOLOGY, 1996, 178 (03) :255-274
[9]   Lateral root initiation in Arabidopsis:: Developmental window, spatial patterning, density and predictability [J].
Dubrovsky, JG ;
Gambetta, GA ;
Hernández-Barrera, A ;
Shishkova, S ;
González, I .
ANNALS OF BOTANY, 2006, 97 (05) :903-915
[10]   Early primordium morphogenesis during lateral root initiation in Arabidopsis thaliana [J].
Dubrovsky, JG ;
Rost, TL ;
Colón-Carmona, A ;
Doerner, P .
PLANTA, 2001, 214 (01) :30-36