scholarly journals Interaction Between Flowering Initiation and Photosynthesis

10.5772/26408 ◽  
2012 ◽  
Author(s):  
Giedr Samuolien ◽  
Pavelas Duchovskis
Keyword(s):  
Flowering Initiation

scholarly journals Effects of Mutagens on Morphological traits of Psoralea corylifolia-A Medicinally Important Plant

2020 ◽  
Vol 26 (2) ◽  
Author(s):  
Ajey Karan Chaudhari ◽  
Anand Prakash Singh ◽  
B R Chaudhary
Keyword(s):  
Plant Height ◽  
Seed Yield ◽  
Morphological Traits ◽  
Mutation Breeding ◽  
Yield Potential ◽  
Mutagenic Potential ◽  
Breeding Programs ◽  
Methane Sulphonate ◽  
Flowering Initiation ◽  
Yield Quality

Mutation breeding like in other plants can significantly strengthen medicinal plants breeding programs and help to produce novel varieties with higher yield potential and improved yield quality. The dry and healthy seeds of P. corylifolia IC 111228 were subjected to mutagenic treatments namely ethyl methane sulphonate (EMS) and sodium azide (SA). The treatment concentrations 15mM, 30mM, 45mM and 60mM of EMS and 1mM, 2mM, 3mM and 4mM of SA were chosen to evaluate the mutagenic potential in either case. The morphological traits were evaluated in M1 generation viz. plant height, days to flowering initiation, seed yield/plant and 100-seed weight. In EMS treatment 15 mM increased the plant height and seed yield, while in SA treatment 4 mM increased the seed yield/plant and 100-seed yield.

scholarly journals AM-Induced Alteration in the Expression of Genes, Encoding Phosphorus Transporters and Enzymes of Carbohydrate Metabolism in Medicago lupulina

Plants ◽  
2020 ◽  
Vol 9 (4) ◽  
pp. 486
Author(s):  
Andrey Yurkov ◽  
Alexey Kryukov ◽  
Anastasia Gorbunova ◽  
Andrey Sherbakov ◽  
Ksenia Dobryakova ◽  
...  
Keyword(s):  
Carbohydrate Metabolism ◽  
Expression Profiles ◽  
Phosphorus Deficiency ◽  
Metabolic Enzymes ◽  
Axillary Shoot ◽  
Shoot Branching ◽  
Medicago Lupulina ◽  
Flowering Initiation ◽  
Initiation Stage ◽  
Enzymes Of Carbohydrate Metabolism

Plant–microbe interactions, including those of arbuscular mycorrhiza (AM), have been investigated for a wide spectrum of model plants. The present study focuses on an analysis of gene expression that encodes phosphate and sugar transporters and carbohydrate metabolic enzymes in a new model plant, the highly mycotrophic Medicago lupulina MLS-1 line under conditions of phosphorus deficiency and inoculation with Rhizophagus irregularis. Expression profiles were detected by RT-PCR at six plant stages of development (second leaf, third leaf, shooting, axillary shoot branching initiation, axillary shoot branching, flowering initiation). In comparison to control (without AM), the variant with AM inoculation exhibited a significant elevation of transcription levels of carbohydrate metabolic enzymes (MlSUS, MlHXK1) and sucrose transporters (MlSUC4) in M. lupulina leaves at the shooting stage. We suggest that this leads to a significant increase in the frequency of AM infection, an abundance of mycelium in roots and an increase in AM efficiency (which is calculated by the fresh weight of aerial parts and roots at the axillary shoot branching initiation stage). In roots, the specificity of MlPT4 and MlATP1 gene expressions were revealed for effective AM symbiosis. The level of MlPT4 transcripts in AM roots increased more than tenfold in comparison to that of non-specific MlPT1 and MlPT2. For the first time, MlPT1 expression was shown to increase sharply against MlPT2 in M. lupulina roots without AM at the shooting initiation stage. A significant increase in MlRUB expression was revealed at late stages in the host plant’s development, during axillary shoot branching and flowering initiation. The opposite changes characterized MlHXK1 expression. Alteration in MlHXK1 gene transcription was the same, but was more pronounced in roots. The obtained results indicate the importance of genes that encode phosphate transporters and the enzymes of carbohydrate metabolism for effective AM development at the shooting stage in the host plant.

Incidence and characterization of pigeonpea stem rot disease caused by Sclerotinia sclerotiorum (lib.) de bary in North Eastern Plain Zone of India

2016 ◽  
Author(s):  
Ashish Kumar Gupta ◽  
Ravish Choudhary ◽  
Bishnu Maya Bashyal ◽  
Ishwar Singh Solanki
Keyword(s):  
Disease Incidence ◽  
Stem Rot ◽  
Sclerotinia Rot ◽  
Formation Stage ◽  
North Eastern ◽  
Flowering Initiation ◽  
White Mycelium ◽  
Maximum Temperatures ◽  
Rot Disease

The incidence of Sclerotinia rot disease was recorded on various pigeonpea cultivars from flowering initiation to pod formation stage during the years 2012-13 and 2013-14. Critical symptoms of the disease were observed as formation of cottony white mycelium along with number of sclerotia on infected tissues. The pathogen was characterized on the basis of morphological and pathological traits. The cool wet winter with average minimum and maximum temperatures (9.2 and 21.0 ºC) and more than 93% relative humidity play an important role for stem rot disease development and spread in pigeonpea crop. The pigeonpea cultivar, ‘ICPL-151’ showed maximum disease incidence, twig infection and yield losses up to 73.35%, 23.58% and 15.70%, respectively, while ‘Kudrat’ and ‘MAL-13’ cultivars were found completely resistant to the disease.

Studies on Determination of Critical Growing Degree Days, Base Temperature (Tb) and Response of Temperature Variations on Flowering and Yield per se in Cowpea [Vigna unguiculata (L.) Walp.]

2020 ◽  
Author(s):  
Venkatesh Bondade ◽  
Sanjeev K Deshpande
Keyword(s):  
Dry Matter ◽  
Significant Negative Correlation ◽  
Growing Degree Days ◽  
Base Temperature ◽  
Degree Days ◽  
Temperature Variations ◽  
Days To Flowering ◽  
Matter Production ◽  
Flowering Initiation

Growing degree days (GDD) or heat units accumulation is the major factor that affects the dry matter production in the plants. In the present investigation eleven genotypes were used to screen for temperature insensitivity through staggered plantings across the seasons in a year. Days to flowering initiation was recorded and base temperature (Tb) was determined using mean daily air temperature (MAT). GDD of individual genotypes was estimated using base temperatures of particular genotypes. It was observed that the GDD, days to flowering initiation and yield were exhibited high variation across the seasons, the flowering time from days to planting (FTDAP) registered significant negative correlation with GDD and MAT and positively correlated with yield. Whereas GDD is positively correlated with MAT and negatively correlated with yield. Here three genotypes namely, IC202926, IC198326 and IC257428 were identified as temperature insensitive genotypes as their performances were comparable across the seasons without much fluctuations.

Changes in release level of momilactone B into the environment from rice throughout its life cycle

2003 ◽  
Vol 30 (9) ◽  
pp. 995 ◽  
Author(s):  
Hisashi Kato-Noguchi ◽  
Takeshi Ino ◽  
Masahiko Ichii
Keyword(s):  
Life Cycle ◽  
Release Rate ◽  
Rice Plant ◽  
Growth Inhibitor ◽  
Rice Plants ◽  
Flowering Initiation ◽  
Single Rice ◽  
Germination And Growth

Momilactone B was released into the neighboring environment from rice throughout its life cycle. The rate of momilactone B release from rice increased until flowering initiation, and then decreased. The release rate of momilactone B at the day of flowering started was 2.1 μg plant–1 d–1. On average, a single rice plant released about 100 μg of momilactone B into the neighboring environment over its life cycle. Since momilactone B is a growth inhibitor, these results suggest that momilactone B released from rice plants may serve as an allelochemical to inhibit the germination and growth of neighboring plants.

GAS EXCHANGE, GROWTH, FLOWERING AND FRUIT PRODUCTION IN SWEET PEPPER (CAPSICUM CHINENSE JACQ) ALONG A THERMAL GRADIENT DETERMINED BY ALTITUDINAL DIFFERENCES IN A TROPICAL REGION

2015 ◽  
Vol 52 (2) ◽  
pp. 251-265 ◽  
Author(s):  
R. E. JAIMEZ ◽  
F. RADA
Keyword(s):  
Gas Exchange ◽  
Leaf Gas Exchange ◽  
Dry Weight ◽  
Sweet Pepper ◽  
Fruit Production ◽  
Tropical Region ◽  
Capsicum Chinense ◽  
Mean Temperature ◽  
Flowering Initiation ◽  
Lower Temperature

SUMMARYA common practice in some South American countries consists in moving around Capsicum chinense cultivars between regions where edaphoclimatic conditions differ notably. The purpose of this research was to compare and relate gas exchange responses with assimilate allocation patterns and flower and fruit production dynamics in a cultivar of C. chinense in three locations with different mean temperatures (19, 24 and 28 °C) along a gradient from 140–1855 m. Leaf gas exchange (leaf conductance, CO2 assimilation and transpiration rates) was measured at 60–70, 110–120 and 140–150 days after transplanting (dat) from seed beds. Dry weight per plant of leaves, stems and roots were determined at 50, 73, 96, 114 and 196 dat. Flowering dynamics and fruit production were followed weekly. A marked reduction (50%) in mean Gs was found at the site with the lowest mean temperature in relation to plants grown at the highest temperature site. Mean daily CO2 assimilation rate was higher for plants in the intermediate site and a reduction of 18 and 42% was found for sites with highest and lowest mean temperature, respectively. We report an adverse effect of low temperatures on growth of C. chinense. Flowering initiation and fruit production was delayed at lower temperatures. An increase in temperature (between 26–30 °C) led to an increase in the number of flowers; below this temperature it remained unchanged. Fruit production is drastically reduced at the lower temperature site due to a large number of aborted flowers and small fruits.

scholarly journals Applied aspects of pineapple flowering

Bragantia ◽  
2005 ◽  
Vol 64 (4) ◽  
pp. 499-516 ◽  
Author(s):  
Getúlio Augusto Pinto da Cunha
Keyword(s):  
Vegetative Growth ◽  
Apical Meristem ◽  
Crop Management ◽  
Chemical Substances ◽  
Complex Process ◽  
General Flowering ◽  
Flowering Initiation ◽  
Underlying Mechanisms ◽  
Flowering Process

Flowering is an amazing, integrated and complex process of multifatorial control, which due to its great importance for agriculture has been extensively studied worldwide. Pineapple is one of the main crops on which many research works about this subject have been carried out, and it was the first one to have artificially induced flowering. However, even with all those studies, pineapple flowering is not yet characterized in many aspects. The main point for the comprehension of the physiologic aspects of flowering initiation is the identification of the factors involved in the differentiation of the apical meristem into floral primordium, as well as how these factors exert their action. This work aimed to describe the flowering process of pineapple plants, including notions about general flowering physiology, pineapple inflorescence, natural and artificial flowering. Flowering relation to several chemical substances which are involved with the vegetative growth of the plant are also discussed, in order to bring out more light on its underlying mechanisms, and also to help in crop management.

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