Flood tolerance and tree distribution in central Amazonian floodplains

1989 ◽  
pp. 47-64 ◽  
Author(s):  
W.J. JUNK
Keyword(s):  
Flood Tolerance ◽  
Tree Distribution

ASSESSMENT OF PINE CROPS GROWTH IN BAIMAK FORESTRY

2020 ◽  
Vol 37 (3) ◽  
pp. 83-90
Author(s):  
T.Z. Mutallapov ◽  
Keyword(s):  
Scots Pine ◽  
Forest Ecosystem ◽  
Distribution Curve ◽  
Comparative Assessment ◽  
Tree Distribution ◽  
Entire Structure ◽  
Structure Changes ◽  
Large Trees ◽  
Different Types ◽  
The Stability

The article presents the results of evaluating the growth of Scots pine in the Baymak forest area. The analysis of forestry and taxation indicators of Scots pine crops on the studied sample areas is carried out, and a comparative assessment of the growth of forest crops growing in different types of forest is given. Increased competition in plantings leads to the natural decline of stunted trees, which is the result of differentiation in the stand. As a result, its structure changes, the number of large trees increases, and, accordingly, the stability of the forest ecosystem increases. In this regard, the appearance of the tree distribution curve by thickness levels also changes. It becomes more "flat", and its competitive load is more evenly distributed over the entire structure of the stand, and competition is weakened.

Roots play a vital role in flood-tolerance of poplar demonstrated by reciprocal grafting

Flora ◽  
2013 ◽  
Vol 208 (8-9) ◽  
pp. 479-487 ◽  
Author(s):  
YanJie Peng ◽  
YuanMei Dong ◽  
BingKun Tu ◽  
ZhiXiang Zhou ◽  
Bo Zheng ◽  
...  
Keyword(s):  
Vital Role ◽  
Flood Tolerance

ANALYSIS OF GENETIC DIVERSITY OF 26 CASSAVA VARIETIES (Manihot esculenta CRANTZ) WITH DIFFERENT RESPONSES TO WATERLOGGING CONDITIONS BY USING RAPD MARKERS

2021 ◽  
Vol 66 (3) ◽  
pp. 170-179
Author(s):  
Sengsoulichan Dethvongsa ◽  
Vu Nguyen Anh ◽  
Van Tran Khanh
Keyword(s):  
Genetic Diversity ◽  
Phylogenetic Tree ◽  
Manihot Esculenta ◽  
Rapd Markers ◽  
Flood Tolerance ◽  
Randomly Amplified Polymorphic Dna ◽  
Manihot Esculenta Crantz ◽  
Rapd Pcr ◽  
Cassava Production ◽  
Cassava Varieties

RAPD (Randomly Amplified Polymorphic DNA) is an indicator for high and stable polymorphism, widely used in the study of the diversity of cassava. In this paper, the results of using 20 polymorphic primers OPK combined with the establishment of the phylogenetic tree to analyze the genetic diversity of 26 cassava varieties with different responses to waterlogging conditions by using the RAPD-PCR technique were presented. The purpose of this experiment was to show the genetic relevance of the studied cassava varieties. The results showed that the flood tolerance of cassava was not related to the polymorphism and branching characteristics of the stem. This information may be use as a basis for selecting flood-tolerant cassava varieties for cassava production, as well as the basis for selecting genetically different parents for breeding.

scholarly journals Within-Tree Distribution and Survival of the Eucalyptus Longhorned Borer Phoracantha semipunctata (Coleoptera: Cerambycidae) in a Mediterranean-Type Ecosystem

Insects ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 225
Author(s):  
Stephen Seaton ◽  
George Matusick ◽  
Giles Hardy
Keyword(s):  
Larval Development ◽  
Larval Survival ◽  
Severe Drought ◽  
Eucalyptus Marginata ◽  
Phoracantha Semipunctata ◽  
Tree Distribution ◽  
Eucalypt Forest ◽  
Attack Patterns ◽  
Mediterranean Type Ecosystem ◽  
Tree Characteristics

The attack patterns, infestation success and larval development of woodborers within living trees are complex and are largely shaped by host tree characteristics. Following a severe drought in a native eucalypt forest where outbreak densities of a native Australian beetle, the eucalyptus longhorned borer (Phoracantha semipunctata), occurred, a tree dissection study was conducted in Australia. This involved felling 40 trees each of jarrah (Eucalyptus marginata) and marri (Corymbia calophylla) that were cut into 1-m sections and neonate larval galleries, larvae in pupal cells and adult borer emergence were measured and added to give total numbers per tree to determine the within-tree distribution and survival of P. semipunctata. There was a significant impact on larval survival in both species, in contrast, pupal survival remained high. Within-tree distribution of P. semipunctata was directional with borer emergence and incidence of larval galleries both negatively associated with tree section height above the ground and positively associated with section diameter and bark thickness, reaching a maximum towards the base of trees. High incidence and survival in lower thicker tree sections indicate a more conducive environment for larval development, in contrast to poor larval survival in smaller thinner sections at the top of trees. The dependence of larval survival on tree characteristics controlling the within-tree distribution of borer emergence is emphasized, and needs to be considered when estimating the spread of borer populations during outbreaks.

scholarly journals Effect of Previous Flood Exposure on Flood Tolerance and Growth of Three Landscape Shrub Taxa Subjected to Repeated Short-term Flooding

2012 ◽  
Vol 30 (2) ◽  
pp. 58-64 ◽  
Author(s):  
Katie L. Dylewski ◽  
Amy N. Wright ◽  
Kenneth M. Tilt ◽  
Charlene LeBleu
Keyword(s):  
Relative Size ◽  
Visual Quality ◽  
The Other ◽  
Flood Tolerance ◽  
Short Term ◽  
Final Size ◽  
Clear Effect ◽  
Flood Exposure ◽  
Size Index ◽  
Flooding Period

Ilex glabra ‘Shamrock’ (‘Shamrock’ inkberry holly), Itea virginica ‘Henry's Garnet’ (‘Henry's Garnet’ sweetspire), and Viburnum nudum ‘Winterthur’ (‘Winterthur’ possumhaw) were flooded for 0 (non-flooded), 3, or 6 d, first in a greenhouse and then outdoors. Flooding treatments were in a factorial combination of greenhouse flooding treatment × outdoor flooding treatment. Following each flooding period, plants were allowed to drain for 6 d and received no irrigation. Plants in the 3 and 6 d flood treatments experienced a total of 7 and 5 flood cycles, respectively both in the greenhouse and outdoors. All taxa maintained 100% survival during greenhouse and outdoor flooding. Following greenhouse flooding, final size index (SI) of I. virginica ‘Henry's Garnet’ and I. glabra ‘Shamrock’ decreased with increasing flood length; V. nudum ‘Winterthur’ had no differences in SI among treatments. Following outdoor flooding, there were no differences in flooding treatment for relative size index (RSI) of I. glabra ‘Shamrock’, no clear effect of flooding treatment on RSI for V. nudum ‘Winterthur’, and RSI of I. virginica ‘Henry's Garnet’ was lowest in plants that were not flooded in the greenhouse. RDW and SDW of I. virginica ‘Henry's Garnet’ and I. glabra ‘Shamrock’ tended to be lowest in plants that were initially flooded in the greenhouse for 6 d, while there was no clear effect of either greenhouse or outdoor flooding on RDW and SDW of V. nudum ‘Winterthur’. When exposed to flooding in the greenhouse I. virginica ‘Henry's Garnet’ seemed to better tolerate outdoor flooding, while the other two taxa did not appear to gain any benefit from previous flood exposure. All three taxa sustained growth throughout all phases of the experiment and maintained good visual quality indicating that all three would be tolerant of repeated, short-term flooding.

Overexpression of the ascorbate peroxidase gene from eggplant and sponge gourd enhances flood tolerance in transgenic Arabidopsis

2017 ◽  
Vol 130 (2) ◽  
pp. 373-386 ◽  
Author(s):  
Chih-Ming Chiang ◽  
Chiu-Chen Chen ◽  
Shi-Peng Chen ◽  
Kuan-Hung Lin ◽  
Li-Ru Chen ◽  
...  
Keyword(s):  
Ascorbate Peroxidase ◽  
Transgenic Arabidopsis ◽  
Flood Tolerance ◽  
Peroxidase Gene ◽  
Sponge Gourd

scholarly journals Snorkeling Strategy: Tolerance to Flooding in Rice and Potential Application for Weed Management

Genes ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 975
Author(s):  
Tiago Edu Kaspary ◽  
Nilda Roma-Burgos ◽  
Aldo Merotto
Keyword(s):  
Weed Control ◽  
Weed Management ◽  
Potential Application ◽  
Genetic Manipulation ◽  
Weedy Rice ◽  
Flood Tolerance ◽  
Flooding Tolerance ◽  
Cultivated Rice ◽  
Tolerance Mechanisms ◽  
Crop Models

Flooding is an important strategy for weed control in paddy rice fields. However, terrestrial weeds had evolved mechanisms of tolerance to flooding, resulting in new ‘snorkeling’ ecotypes. The aim of this review is to discuss the mechanisms of flooding tolerance in cultivated and weedy rice at different plant stages and the putative utility of this trait for weed management. Knowledge about flooding tolerance is derived primarily from crop models, mainly rice. The rice model informs us about the possible flooding tolerance mechanisms in weedy rice, Echinochloa species, and other weeds. During germination, the gene related to carbohydrate mobilization and energy intake (RAmy3D), and genes involved in metabolism maintenance under anoxia (ADH, PDC, and OsB12D1) are the most important for flooding tolerance. Flooding tolerance during emergence involved responses promoted by ethylene and induction of RAmy3D, ADH, PDC, and OsB12D1. Plant species tolerant to complete submersion also employ escape strategies or the ability to become quiescent during the submergence period. In weedy rice, the expression of PDC1, SUS3, and SUB1 genes is not directly related to flooding tolerance, contrary to what was learned in cultivated rice. Mitigation of flooding tolerance in weeds could be achieved with biotechnological approaches and genetic manipulation of flood tolerance genes through RNAi and transposons, providing a potential new tool for weed management.

Genes/QTLs affecting flood tolerance in rice

2008 ◽  
pp. 284-287
Author(s):  
K. Sripongpankul ◽  
G. B. L. Posa ◽  
D. Senadhira ◽  
N. Huang ◽  
D. S. Brar ◽  
...  
Keyword(s):  
Flood Tolerance
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