Plant Tropisms

1.2 Identification and characterization of gravity perception sites in plant organs Gravity has been shown to regulate the orien ...

(Figure 1.2), had the strongest inhibitory effect on the gravity response—identifying those specific cells of the cap as the mos ...

sulting roots were agravitropic, providing further evidence that the cap is the primary site of gravity perception in roots. Des ...

to encode transcription factors necessary for the normal development of the endodermis in roots and shoots. Both mutants failed ...

Further evidence for the role of vacuolar membrane dynamics in shoot gravitropism comes from the analysis of another mutant in A ...

within seconds to minutes after gravistimulation. As discussed in Chapter 2, the role for InsP 3 as a likely universal signaling ...

support for the starch-statolith hypothesis comes from the observation that gravitropism is impaired in shoots of the eal1mutant ...

1.3.2 Amyloplast Sedimentation Is Influenced by the Environment and Developmental Stage of the Plant To optimize exposure to the ...

proposal, called the gravitational pressure model, originated with studies in single intern- odal cells of Chara.Charainternodes ...

The plant cytoskeleton is a network of dynamic filamentous proteins that consist of microtubules, actin filaments (F-actin), and ...

erated by these “rogue” amyloplasts could be amplified several-fold, leading to a stronger gravitropic response. Alternatively, ...

whelming. Both processes working in tandem might be part of a redundant mechanism to ensure the plant’s best chances for surviva ...

Collings DA, Winter H, Wyatt SE, and Allen NS. 1998. Growth dynamics and the cytoskeleton or- ganization during stem maturation ...

Kiss JZ, Hertel R, and Sack FD. 1989. Amyloplasts are necessary for full gravitropic sensitivity in roots of Arabidopsis thalian ...

Saether N, and Iversen TH. 1991. Gravitropism and starch statoliths in an Arabidopsismutant. Planta184:491–7. Saito Y, Yamasaki ...

Yano D, Sato M, Saito C, Sato MH, Morita MT, and Tasaka M. 2003. A SNARE complex contain- ing SGR3/AtVAM3 and ZIG/VTI11 in gravi ...

...

2 Signal Transduction in Gravitropism Benjamin R. Harrison, Miyo T. Morita, Patrick H. Masson*, and Masao Tasaka 21 2.1 Introduc ...

elongation zones) (Masson et al. 2002). Hence, in roots, the gravity-induced lateral auxin gradient generated across the cap has ...

23 Figure 2.1(also see Color Section). Histological differences between roots and inflorescence stems trans- late into gravitrop ...