scholarly journals Interactions between a root hemiparasite and 27 different hosts: Growth, biomass allocation and plant architecture

2017 ◽  
Vol 24 ◽  
pp. 118-137 ◽  
Author(s):  
Diethart Matthies
Keyword(s):  
Biomass Allocation ◽  
Plant Architecture ◽  
Root Hemiparasite

Plant architecture, growth and biomass allocation effects of the invasive pathogen myrtle rust (Austropuccinia psidii ) on Australian Myrtaceae species after fire

2019 ◽  
Vol 45 (2) ◽  
pp. 177-186
Author(s):  
Laura Fernandez Winzer ◽  
Will Cuddy ◽  
Geoff S. Pegg ◽  
Angus J. Carnegie ◽  
Anthony Manea ◽  
...  
Keyword(s):  
Biomass Allocation ◽  
Plant Architecture ◽  
Myrtle Rust ◽  
Invasive Pathogen ◽  
Austropuccinia Psidii

Life-history variation in the annual arable weed Diplotaxis erucoides (Cruciferae)

1994 ◽  
Vol 72 (1) ◽  
pp. 10-19 ◽  
Author(s):  
F. X. Sans ◽  
R. M. Masalles
Keyword(s):  
Life History ◽  
Biomass Allocation ◽  
Plant Architecture ◽  
Reproductive Effort ◽  
Plant Size ◽  
Early Spring ◽  
Life History Variation ◽  
Arable Weed ◽  
Vegetative Biomass ◽  
Diplotaxis Erucoides

Variation in life-history traits such as emergence, survival, time of flowering, and fecundity were studied in Diplotaxis erucoides, a mediterranean winter annual weed, by analyzing cohorts that emerged in autumn, early spring, and spring. The response of the plants to the environment, as reflected by plant architecture and pattern of biomass allocation, was also studied. Seedlings that germinate in autumn produced from 3 to 10 times more seeds than those that germinated in spring. The main factor affecting the number of seeds produced appears to be the life-span. Reduction of the growing period led to a decrease in both number and length of modular units, which resulted in decreased numbers of leaves, flowers, and fruits of each module. In semelparous D. erucoides plants, differences in the pattern of biomass allocation to reproduction are related to plant size. Our field data indicate that an increase of reproductive effort with size occurs in small individuals; however, a decrease occurs for vegetative biomass greater than 2 g and less than 5 g. Little variation in reproductive effort occurs when vegetative biomass is greater than 5 g. From a strategic point of view, size-dependent variation of reproductive effort in D. erucoides can be interpreted as good tactics to favour a higher proportion of resources devoted to reproduction in small individuals, thus ensuring some offspring. However, structural, developmental, and physiological constraints lead to stabilization or even a decrease in reproductive effort above a certain threshold size, when production of offspring is already ensured. Key words: phenotypic plasticity, plant architecture, biomass allocation, Diplotaxis erucoides.

VEGETATIVE AND BUNCH COMPONENTS OF FIRST PSEUDOBACKCROSS OF Elaeis oleifera BRAZIL AND SURINAME ORIGIN IN NORTH SUMATRA, INDONESIA

2018 ◽  
Vol 26 (1) ◽  
pp. 23-28
Author(s):  
Heri Adriwan Siregar ◽  
Hernawan Yuli Rahmadi ◽  
Retno Diah Setiowati ◽  
Edy Suprianto
Keyword(s):  
Interspecific Hybrid ◽  
Plant Architecture ◽  
Elaeis Guineensis ◽  
Morphological Properties ◽  
Height Increment ◽  
Elaeis Oleifera ◽  
Almost All ◽  
North Sumatra ◽  
Two Populations ◽  
Hybrid Cross

An Attempt to combine the superior traits of Elaeis oleifera and Elaeis guineensis have been done through an interspecific hybrid cross and followed by pseudo-backcross 1 (pBC1). Observation of vegetative morphology and bunch components are presented in this paper. Two populations of pBC1 E. oleifera from the Suriname and Brazil origin were planted in 1990, 1993, 1995, and 2005, and were intensively observed for vegetative morphological properties and bunch components in November 2016 to February 2018. The results showed that almost all the individuals of pBC1 grew upright such as E. guineensis, no longer growing horizontally like the wild E. oleifera and the interspecific hybrid populations. The datas showed that the Suriname population plant architecture are compact or smaller than the Brazilian origin including the height increment and the size of the stem, the frond architecture and its components. Similarly, the bunch components show that the pBC1 Brazil is slightly superior to Suriname pBC1.

scholarly journals Generic Additive Allometric Models and Biomass Allocation for Two Natural Oak Species in Northeastern China

Forests ◽  
2021 ◽  
Vol 12 (6) ◽  
pp. 715
Author(s):  
Shengwang Meng ◽  
Fan Yang ◽  
Sheng Hu ◽  
Haibin Wang ◽  
Huimin Wang
Keyword(s):  
Biomass Allocation ◽  
Tree Height ◽  
Northeastern China ◽  
Seemingly Unrelated Regression ◽  
Biomass Estimation ◽  
Model Parameters ◽  
Stem Biomass ◽  
Crown Width ◽  
Biomass Models ◽  
Mongolian Oak

Current models for oak species could not accurately estimate biomass in northeastern China, since they are usually restricted to Mongolian oak (Quercus mongolica Fisch. ex Ledeb.) on local sites, and specifically, no biomass models are available for Liaodong oak (Quercuswutaishanica Mayr). The goal of this study was, therefore, to develop generic biomass models for both oak species on a large scale and evaluate the biomass allocation patterns within tree components. A total of 159 sample trees consisting of 120 Mongolian oak and 39 Liaodong oak were harvested and measured for wood (inside bark), bark, branch and foliage biomass. To account for the belowground biomass, 53 root systems were excavated following the aboveground harvest. The share of biomass allocated to different components was assessed by calculating the ratios. An aboveground additive system of biomass models and belowground equations were fitted based on predictors considering diameter (D), tree height (H), crown width (CW) and crown length (CL). Model parameters were estimated by jointly fitting the total and the components’ equations using the weighted nonlinear seemingly unrelated regression method. A leave-one-out cross-validation procedure was used to evaluate the predictive ability. The results revealed that stem biomass accounts for about two-thirds of the aboveground biomass. The ratio of wood biomass holds constant and that of branches increases with increasing D, H, CW and CL, while a reverse trend was found for bark and foliage. The root-to-shoot ratio nonlinearly decreased with D, ranging from 1.06 to 0.11. Tree diameter proved to be a good predictor, especially for root biomass. Tree height is more prominent than crown size for improving stem biomass models, yet it puts negative effects on crown biomass models with non-significant coefficients. Crown width could help improve the fitting results of the branch and foliage biomass models. We conclude that the selected generic biomass models for Mongolian oak and Liaodong oak will vigorously promote the accuracy of biomass estimation.

Modification of cereal plant architecture by genome editing to improve yields

2021 ◽  
Author(s):  
Xin Huang ◽  
Julia Hilscher ◽  
Eva Stoger ◽  
Paul Christou ◽  
Changfu Zhu
Keyword(s):  
Genome Editing ◽  
Plant Architecture ◽  
Cereal Plant
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