scholarly journals A Study of the Leaf Phenology and Thermonastic Leaf Movement of Daphniphyllum macropodum

2017 ◽  
Vol 62 (2) ◽  
pp. 329-335
Author(s):  
Seok–Gon Park ◽  
Masaru Matsumoto
Keyword(s):  
Leaf Phenology ◽  
Leaf Movement ◽  
Daphniphyllum Macropodum

Modelling leaf phenology of some trees with accumulated temperature in a temperate forest in northeast China

2021 ◽  
Vol 489 ◽  
pp. 119085
Author(s):  
Zhenzhao Xu ◽  
Qijing Liu ◽  
Wenxian Du ◽  
Guang Zhou ◽  
Lihou Qin ◽  
...  
Keyword(s):  
Northeast China ◽  
Temperate Forest ◽  
Leaf Phenology ◽  
Accumulated Temperature

scholarly journals Crown Structure Explains the Discrepancy in Leaf Phenology Metrics Derived from Ground- and UAV-Based Observations in a Japanese Cool Temperate Deciduous Forest

Forests ◽  
2021 ◽  
Vol 12 (4) ◽  
pp. 425
Author(s):  
Noviana Budianti ◽  
Hiromi Mizunaga ◽  
Atsuhiro Iio
Keyword(s):  
Deciduous Forest ◽  
Leaf Expansion ◽  
Image Resolution ◽  
Leaf Phenology ◽  
Visual Interpretation ◽  
Temperate Deciduous Forest ◽  
Individual Tree ◽  
Crown Structure ◽  
Uav Images ◽  
The Individual

Unmanned aerial vehicles (UAV) provide a new platform for monitoring crown-level leaf phenology due to the ability to cover a vast area while offering branch-level image resolution. However, below-crown vegetation, e.g., understory vegetation, subcanopy trees, and the branches of neighboring trees, along with the multi-layered structure of the target crown may significantly reduce the accuracy of UAV-based estimates of crown leaf phenology. To test this hypothesis, we compared UAV-derived crown leaf phenology results against those based on ground observations at the individual tree scale for 19 deciduous broad-leaved species (55 individuals in total) characterized by different crown structures. The mean crown-level green chromatic coordinate derived from UAV images poorly explained inter- and intra-species variations in spring leaf phenology, most probably due to the consistently early leaf emergence in the below-crown vegetation. The start dates for leaf expansion and end dates for leaf falling could be estimated with an accuracy of <1-week when the influence of below-crown vegetation was removed from the UAV images through visual interpretation. However, a large discrepancy between the phenological metrics derived from UAV images and ground observations was still found for the end date of leaf expansion (EOE) and start date of leaf falling (SOF). Bayesian modeling revealed that the discrepancy for EOE increased as crown length and volume increased. The crown structure was not found to contribute to the discrepancy in SOF value. Our study provides evidence that crown structure is a pivotal factor to consider when using UAV photography to reliably estimate crown leaf phenology at the individual tree-scale.

The chemistry of leaf-movement in Mimosa pudica L.

Tetrahedron ◽  
1999 ◽  
Vol 55 (36) ◽  
pp. 10937-10948 ◽  
Author(s):  
Minoru Ueda ◽  
Shosuke Yamamura
Keyword(s):  
Leaf Movement ◽  
Mimosa Pudica

EFFECT OF WATER STRESS ON LEAF MOVEMENT IN OLIVE CULTIVARS

1999 ◽  
pp. 445-448 ◽  
Author(s):  
S. Natali ◽  
C. Bignami ◽  
C. Cammilli ◽  
M. Muganu
Keyword(s):  
Water Stress ◽  
Leaf Movement ◽  
Effect Of Water ◽  
Olive Cultivars

Green leaf phenology at Landsat resolution: Scaling from the field to the satellite

2006 ◽  
Vol 100 (2) ◽  
pp. 265-279 ◽  
Author(s):  
J FISHER ◽  
J MUSTARD ◽  
M VADEBONCOEUR
Keyword(s):  
Leaf Phenology ◽  
Green Leaf

scholarly journals Proteomic analysis of the pulvinus, a heliotropic tissue, in Glycine max

2014 ◽  
Vol 5 (1) ◽  
Author(s):  
Hakme Lee ◽  
Wesley M. Garrett ◽  
Joseph Sullivan ◽  
Irwin Forseth ◽  
Savithiry S. Natarajan
Keyword(s):  
Mass Spectrometry ◽  
Gene Ontology ◽  
Gel Electrophoresis ◽  
Proton Transport ◽  
Enrichment Analysis ◽  
The Sun ◽  
Leaf Movement ◽  
Two Dimensional ◽  
Two Dimensional Gel Electrophoresis ◽  
Leguminous Plants

Certain plant species respond to light, dark, and other environmental factors by leaf movement. Leguminous plants both track and avoid the sun through turgor changes of the pulvinus tissue at the base of leaves. Mechanisms leading to pulvinar turgor flux, particularly knowledge of the proteins involved, are not well-known. In this study we used two-dimensional gel electrophoresis and liquid chromatography-tandom mass spectrometry to separate and identify the proteins located in the soybean pulvinus. A total of 183 spots were separated and 195 proteins from 165 spots were identified and functionally analyzed using single enrichment analysis for gene ontology terms. The most significant terms were related to proton transport. Comparison with guard cell proteomes revealed similar significant processes but a greater number of pulvinus proteins are required for comparable analysis. To our knowledge, this is a novel report on the analysis of proteins found in soybean pulvinus. These findings provide a better understanding of the proteins required for turgor change in the pulvinus.

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