関連する実験動画

Updated: Jan 24, 2026

An Efficient Clearing Protocol for the Study of Seed Development in Tomato Solanum lycopersicum L.

An Efficient Clearing Protocol for the Study of Seed Development in Tomato Solanum lycopersicum L.

Published on: September 7, 2022

トマト（Solanum lycopersicum L.）における局所的な捕食によって誘発されるジャスモン酸媒介の全身性シグナル伝達は、全身性の気孔閉鎖を調整する

Yibin Lin^1,2,3, Lu Tong^1,2, Xiaomin Song³

¹State Key Laboratory of Agricultural and Forestry Biosecurity, Key Laboratory of Ministry of Education for Genetics, Breeding and Multiple Utilization of Crops, College of Agriculture, Fujian Agriculture and Forestry University, Fuzhou, China.

Plant, cell & environment

|January 23, 2026

Abstract:

Upon attack by insect herbivores, plants can perceive herbivore-derived physical and chemical cues and rapidly reallocate their resources for growth and defense. Insect herbivory specifically induces rapid systemic down-regulation of plant photosynthesis, characterized by whole-plant systemic stomatal closure. However, its underlying mechanism is not fully understood. Here, we found that the simulated herbivory (wounding + oral secretion, WOS) in tomato local (treated) leaflets triggered a decrease of more than 45.0% in stomatal conductance (g_s) in the systemic (adjacent and distal) uninjured leaflets 3 h after the treatment. Local WOS treatment also induced local upregulation of jasmonic acid (JA) biosynthesis genes and systemic JA accumulation in wild-type tomato. Consistently, the systemic stomatal closure response was severely compromised in JA synthesis-deficient mutants (spr2 and spr8). Grafting experiments with wild-type and spr8 mutant proved that the local JA biosynthesis triggered by WOS is essential for systemic stomatal closure. In addition, JA-mediated H₂O₂ bursts in the systemic guard cells is vital for systemic stomatal closure triggered by local WOS treatment. Our findings reveal a crucial role of local JA biosynthesis and systemic JA-mediated H₂O₂ bursts in systemic stomatal responses triggered by insect herbivory in tomato.

キーワード:

ROS 昆虫の捕食ジャスモン酸植物ホルモン植物と昆虫の相互作用気孔コンダクタンス全身性気孔応答

さらに関連する動画

Wide-Field, Real-Time Imaging of Local and Systemic Wound Signals in Arabidopsis

Wide-Field, Real-Time Imaging of Local and Systemic Wound Signals in Arabidopsis

Published on: June 4, 2021

Co-localization of Cell Lineage Markers and the Tomato Signal

Co-localization of Cell Lineage Markers and the Tomato Signal

Published on: December 28, 2016

関連する概念動画

Vector Transformation in Rotating Coordinate Systems

Vector Transformation in Rotating Coordinate Systems

Consider a vector rotating about an axis with an angular velocity, such that its tip sweeps a circular path.

Second Order systems II

Second Order systems II

In an underdamped second-order system, where the damping ratio ζ is between 0 and 1, a unit-step input results in a transfer function that, when transformed using the inverse Laplace method, reveals the output response. The output exhibits a damped sinusoidal oscillation, and the difference between the input and output is termed the error signal. This error signal also demonstrates damped oscillatory behavior. Eventually, as the system reaches a steady state, the error diminishes to zero.

First Order Systems

First Order Systems

First-order systems, such as RC circuits, are foundational in understanding dynamic systems due to their straightforward input-output relationship. Analyzing their responses to different input functions under zero initial conditions reveals significant insights into system behavior.
When a first-order system is subjected to a unit-step input, its response is characterized by its transfer function. By applying the Laplace transform of the unit-step input to the transfer function, expanding the...

Second Order systems I

Second Order systems I

A servo system exemplifies a second-order system, featuring a proportional controller and load elements that ensure the output position aligns with the input position. The relationship between these components is described by a second-order differential equation. Applying the Laplace transform under zero initial conditions yields the transfer function, showing how inputs are converted to outputs in the system.
By reinterpreting the system, one can derive the closed-loop transfer function, which...

Classification of Systems-I

Classification of Systems-I

Linearity is a system property characterized by a direct input-output relationship, combining homogeneity and additivity.
Homogeneity dictates that if an input x(t) is multiplied by a constant c, the output y(t) is multiplied by the same constant. Mathematically, this is expressed as:

Classification of Systems-II

Classification of Systems-II

Continuous-time systems have continuous input and output signals, with time measured continuously. These systems are generally defined by differential or algebraic equations. For instance, in an RC circuit, the relationship between input and output voltage is expressed through a differential equation derived from Ohm's law and the capacitor relation,