Simultaneous Monitoring of Leaf Growth and Leaf Movement

Simultaneous monitoring of leaf growth and leaf movement.

Leaves experience predictable 24-h (diel) fluctuations in environmental factors such as light and temperature, as well as in energy availability. Accordingly, leaf growth is among the many processes regulated by the circadian clock. Despite the importance of leaf growth to the plant, it is relatively poorly understood, in large part due to the difficulty of tracking growth in leaves compared wi...

A Leaf Detection Method Using Image Sequences and Leaf Movement

Besides harvesting the fruits, a very time demanding task is removing old leaves from cucumber and tomato plants grown in greenhouses. To be able to automate this process by a robot, a leaf detection method is required. One possibility for the detection is to exploit the different dynamic behaviour of leaves and stems in case they are excited by mechanical impulse such as an airstream. The obje...

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Active suppression of a leaf meristem orchestrates determinate leaf growth

Leaves are flat determinate organs derived from indeterminate shoot apical meristems. The presence of a specific leaf meristem is debated, as anatomical features typical of meristems are not present in leaves. Here we demonstrate that multiple NGATHA (NGA) and CINCINNATA-class-TCP (CIN-TCP) transcription factors act redundantly, shortly after leaf initiation, to gradually restrict the activity ...

Substances in Leaf Growth

It was shown by Went7 that leaf growth in etiolated pea seedlings is primarily controlled by substances supplied from the cotyledons. Vein growth is controlled by auxin,2 while growth of the mesophyll is independent of auxin, and it is the factors concerned in the growth of the latter which we will discuss in this paper. In a recent paper3 a bio-assay for these factors was described in detail, ...