The Future Role of Crop Physiologists, a Personal View

Palmer, Jeda

doi:10.17660/actahortic.2014.1058.24

Cited by 9 publications

(3 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Plant responses to environmental factors usually result in changes in the diurnal photosynthetic parameters (Palmer, 2014;Li et al, 2015). Considered as a plant Figure 6: The actual PSII efficiency of energy conversion under light exposure values (F v '/F m ') values at 8:00 (early morning), 12:00 (late morning), and 16:00 (afternoon) in summer (A), autumn (B), winter (C) and spring (D) seasons, for the six treatments related to black pepper distances to the rubber trees: at 2.0 m from on the southern (T2S) and northern (T2N) sides; at 5.0 m on the southern (T5S) and northern (T5N) sides; at 8.0 m (T8), which was the central row of black pepper, and unshaded black pepper (Tsun).…”

Section: Changes In Light Steady-state Fluorescence Parametersmentioning

confidence: 99%

Physiological responses of photosynthesis in black pepper plants under different shade levels promoted by intercropping with rubber trees

et al. 2018

View full text Add to dashboard Cite

Plants of black pepper (Piper nigrum L.) may display changes in their photosynthetic activity as a result of environmental seasonal changes. Intercropping with tree species may represent an alternative to mitigate the impacts of climatic changes on crops. The objective of this work was to evaluate the physiological responses of photosynthesis in black pepper plants under different shade levels promoted by intercropping with rubber trees (Hevea brasiliensis (Willd. ex A. Juss.) Müll. Arg. The photosynthetic performance in black pepper along the day was evaluated under full sun and five shade levels. The resulted showed that variations positives in leaf gas exchanges were not exclusively dependent on the shade promoted by the distance in relation with the line of rubber trees in the field, but also fluctuate depending on the period of the day, the orientation (Northern or Southern), relating the line of trees and the season of the year. This study showed that shaded intercropped plants displayed some advantage in a few cases (black pepper plants located at 2 m, and 5 m between rubber trees, southern side) as regards the photosynthetic rate at midday and afternoon, and especially in summer, when compared to pepper plants cultivated in full sunlight condition, That would be likely related to the to the maintenance of somewhat lower temperature and higher relative humidity in the atmosphere close to the black pepper plant implying some advantage for such consortium system to mitigate the possible effects of future climate changes, like warming.

show abstract

Section: Changes In Light Steady-state Fluorescence Parametersmentioning

confidence: 99%

Physiological responses of photosynthesis in black pepper plants under different shade levels promoted by intercropping with rubber trees

et al. 2018

View full text Add to dashboard Cite

show abstract

“…However, it is noteworthy that black pepper, when cultivated with LS, at the time of water deficit, presented higher gas exchange parameters, especially at higher doses of N (40 g N plant -1 and 60 g N plant -1 ), compared to cultivation with WS, which suggests that LS favors black pepper in situations of lower water regime and tends to attenuate the deleterious effects of soil water deficit. In this context, changes in gas exchange parameters to avoid excessive water loss is considered a defense strategy for plants against environmental factors such as: decreased water availability, increased radiation, and temperature (Palmer, 2012;Li et al, 2015;Ferraz et al, 2016). Furthermore, N can promote greater plant adaptation to water stress (low water availability), minimizing its effect, either through the regulation of enzyme activity related to the carbon reductive cycle (Sugiharto et al, 1990;Taiz and Zeiger, 2013) or by regulating stomatal conductance to water vapor (Guidi et al, 1998, Zhang et al, 2017.…”

Section: Discussionmentioning

confidence: 99%

Nitrogen effects on leaf gas exchange, vegetative growth and yield of black pepper plants using Gliricidia sepium as living support

Rubia¹,

Hugo²,

Edilson³

et al. 2023

Afr. J. Agric. Res.

View full text Add to dashboard Cite

For the implantation of one hectare of black pepper (Piper nigrum), about 25 to 30 trees are removed from the Amazon Forest to produce tutors for black pepper. As an alternative to the dead wooden stake (WS), there is sustainable cultivation of black pepper with tree species, with the living supports (LS) of gliricídia (Gliricidia sepium L.). However, there is inadequate technical information on the effect of black pepper cultivation with tree species on the growth, physiology, and production of the culture. Therefore, the objective of this study is to evaluate the vegetative growth, physiology, and production of black pepper, cultivated in a LS subjected to doses of nitrogen (N). The experiment was carried in a randomized design blocks, in split plots, with three replications in a field. The plots consisted of two tutors (dead tutor and live tutor of G. sepium) and the subplots consisted of increasing doses of N (10, 20, 40 and 60g N plant -1 ). The results indicated that black pepper plants in WS stand out in terms of initial growth; however, at the end of the first year of black pepper cultivation with LS tends to present a vegetative growth slightly like the cultivation with a WS. The production of green pepper was higher in cultivation with G. sepium, while in terms of dry pepper there was no distinction between the tutors, with only N doses affected, which was estimated at 37 g N plant -1 to obtain the highest productivity of dry pepper.

show abstract

“…The amount of total nutrients stored in the fruit can be estimated from the amount of stored dry mass. Dry mass percentage in an apple depends on cultivar, rootstock, planting system, crop load, pruning technique and meteorological conditions [29][30][31].…”

Section: Introductionmentioning

confidence: 99%

The Influence of Agrotechnological Tools on cv. Rubin Apples Quality

2021

View full text Add to dashboard Cite

With the growing demand for quality food in the world, there is a new ambition to produce high-quality apples seeking reduced cultivation costs. The aim of this study was to evaluate the influence of agrotechnological tools on the quality of cv. Rubin apples during the harvest. The apple tree (Malus domestica Borkh.) cv. Rubin was grafted on dwarfing rootstocks P60, planted in single rows spaced 1.25 m between trees and 3.5 m between rows. Six agrotechnological tools were used—hand pruning, mechanical pruning, trunk incision, calcium-prohexadione, summer pruning and mechanical pruning one side, changing sides annually. The agrotechnical tools had no significant effect on accumulation of most sugars and elements, malic, folic and succinic acids in the fruits. Mechanical pruning resulted in significant accumulation of phenolic compounds, antioxidants, ascorbic acid, but reduced the amount of glucose compared to hand pruning. However, the trunk incision or spraying with ca-prohexadione together with mechanical pruning had no significant effect on sugar content but resulted in significantly higher amounts of phenols, antioxidants, ascorbic acid, Fe and Mn and reduced starch and citric acid.

show abstract

The Future Role of Crop Physiologists, a Personal View

Cited by 9 publications

References 0 publications

Physiological responses of photosynthesis in black pepper plants under different shade levels promoted by intercropping with rubber trees

Physiological responses of photosynthesis in black pepper plants under different shade levels promoted by intercropping with rubber trees

Nitrogen effects on leaf gas exchange, vegetative growth and yield of black pepper plants using Gliricidia sepium as living support

The Influence of Agrotechnological Tools on cv. Rubin Apples Quality

Contact Info

Product

Resources

About