Seasonal Patterns in Water Relations of Two Species of Goldenrods (Solidago) Grown on an Experimental Soil Moisture Gradient

1984 ◽  
Vol 111 (2) ◽  
pp. 171 ◽  
Author(s):  
M. A. Potvin ◽  
P. A. Werner
Keyword(s):  
Soil Moisture ◽  
Water Relations ◽  
Moisture Gradient ◽  
Seasonal Patterns ◽  
Soil Moisture Gradient ◽  
Experimental Soil

scholarly journals Trait plasticity and covariance along a continuous soil moisture gradient

2020 ◽  
Author(s):  
J. Grey Monroe ◽  
Haoran Cai ◽  
David L. Des Marais
Keyword(s):  
Soil Moisture ◽  
Water Relations ◽  
Moisture Gradient ◽  
Plant Water Relations ◽  
Plant Water ◽  
Soil Moisture Gradient ◽  
Non Linear ◽  
Model Grass ◽  
Soil Moisture Variability ◽  
Moisture Variability

Water availality is perhaps the greatest environmental determinant of plant yield and fitness. Yet our understanding of plant-water relations is limited because it is primarily informed by experiments considering soil moisture variability at two discrete levels - wet and dry - rather than as a continually varying environmental gradient. Here we used experimental and statistical methods based on function-valued traits to explore responses to continuously varying soil moisture gradient in physiological and morphological traits in two species and five genotypes each of the model grass Brachypodium. We find that most traits exhibit non-linear responses to soil moisture variability. We also observe differences in the shape of these non-linear responses between traits, species, and genotypes. Emergent phenomena arise from this variation including changes in trait correlations and evolutionary constraints as a function of soil moisture. These results point to the importance of considering non-linearity in plant-water relations to understand plastic and evolutionary responses to changing climates.

EFFECT OF DEFICIT IRRIGATION ON YIELD, RELATIVE LEAF WATER CONTENT, LEAF PROLINE ACCUMULATION AND CHLOROPHYLL STABILITY INDEX OF COTTON–MAIZE CROPPING SEQUENCE

2013 ◽  
Vol 50 (3) ◽  
pp. 407-425 ◽  
Author(s):  
T. SAMPATHKUMAR ◽  
B. J. PANDIAN ◽  
P. JEYAKUMAR ◽  
P. MANICKASUNDARAM
Keyword(s):  
Soil Moisture ◽  
Water Stress ◽  
Water Content ◽  
Deficit Irrigation ◽  
Stability Index ◽  
Moisture Gradient ◽  
Proline Content ◽  
Leaf Water Content ◽  
Chlorophyll Stability Index ◽  
Soil Moisture Gradient

SUMMARYWater stress induces some physiological changes in plants and has cumulative effects on crop growth and yield. Field experiments were conducted to study the effect of deficit irrigation (DI) on yield and some physiological parameters in cotton and maize in a sequential cropping system. Creation of soil moisture gradient is indispensable to explore the beneficial effects of partial root zone drying (PRD) irrigation and it could be possible only through alternate deficit irrigation (ADI) practice in paired row system of drip layout that is commonly practiced in India. In the present study, PRD and DI concepts (creation of soil moisture gradient) were implemented through ADI at two levels of irrigation using drip system. Maize was sown after cotton under no till condition without disturbing the raised bed and drip layout. Relative leaf water content (RLWC) and chlorophyll stability index (CSI) of cotton and maize were reduced under water stress. A higher level of leaf proline content was observed under severe water-stressed treatments in cotton and maize. RLWC and CSI were highest and leaf proline content was lowest in mild water deficit (ADI at 100% crop evapotranspiration once in three days) irrigation in cotton and maize. The same treatments registered higher values for crop yields, net income and benefit cost ratio for both the crops.

scholarly journals Vegetation of the Witbank Nature Reserve and its importance for conservation of threatened Rocky Highveld Grassland

Koedoe ◽  
1997 ◽  
Vol 40 (2) ◽  
Author(s):  
C.M. Smit ◽  
G.J. Bredenkamp ◽  
N. Van Rooyen ◽  
A.E. Van Wyk ◽  
J.M. Combrinck
Keyword(s):  
Soil Moisture ◽  
Plant Communities ◽  
Nature Reserve ◽  
Soil Depth ◽  
Floristic Composition ◽  
Diversity Indices ◽  
Moisture Gradient ◽  
Negative Effects ◽  
Soil Moisture Gradient ◽  
Great Escarpment

A vegetation survey of the Witbank Nature Reserve, comprising 847 hectares, was conducted. Phytosociological data were used to identify plant communities, as well as to determine alpha and beta diversities. Eleven plant communities were recognised, two of these are subdivided into sub- communities, resulting in 14 vegetation units. These communities represent four main vegetation types, namely grassland, woodland, wetland and disturbed vegetation. Grassland communities have the highest plant diversity and wetland vegetation the lowest. Floristic composition indicates that the vegetation of the Rocky Highveld Grassland has affinities to the grassland and savanna biomes and also to the Afromontane vegetation of the Great Escarpment. An ordination scatter diagram shows the distribution of the 14 plant communities or sub-communities along a soil moisture gradient, as well as along a soil depth/surface rock gradient. The sequence of communities along the soil moisture gradient is used for calculating beta-diversity indices. It is concluded that the relatively small size of the Witbank Nature Reserve is unlikely to have significant negative effects on the phytodiversity of the various plant communities. This nature reserve is therefore of considerable importance in conserving a representative sample of the Rocky Highveld Grassland.

Effect of soil moisture gradient on structure of broad-leaved/Korean pine forest in Changbai Mountain

2004 ◽  
Vol 15 (2) ◽  
pp. 119-123 ◽  
Author(s):  
Wang Yan ◽  
Wang Qing-li ◽  
Dai Li-min ◽  
Wang Miao ◽  
Zhou Li ◽  
...  
Keyword(s):  
Soil Moisture ◽  
Moisture Gradient ◽  
Pine Forest ◽  
Changbai Mountain ◽  
Korean Pine ◽  
Soil Moisture Gradient ◽  
Korean Pine Forest

Asymmetric Responses of Paspalum Species to a Soil Moisture Gradient

Crop Science ◽  
2009 ◽  
Vol 49 (4) ◽  
pp. 1473-1480 ◽  
Author(s):  
Gerald M. Henry ◽  
Fred H. Yelverton ◽  
Michael G. Burton
Keyword(s):  
Soil Moisture ◽  
Moisture Gradient ◽  
Soil Moisture Gradient ◽  
Asymmetric Responses

Oribatida (Acari) communities in arable soils formed under waterlogged conditions: the influence of a soil moisture gradient

Biologia ◽  
2019 ◽  
Vol 75 (2) ◽  
pp. 243-257
Author(s):  
Patrícia Jakšová ◽  
Peter Ľuptáčik ◽  
Dana Miklisová ◽  
Františka Horváthová ◽  
Helena Hlavatá
Keyword(s):  
Soil Moisture ◽  
Moisture Gradient ◽  
Arable Soils ◽  
Soil Moisture Gradient
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