Next Article in Journal
Changes in the Polyphenolic Profile, Carotenoids and Antioxidant Potential of Apricot (Prunus armeniaca L.) Leaves during Maturation
Previous Article in Journal
Rice Cultivation and Greenhouse Gas Emissions: A Review and Conceptual Framework with Reference to Ghana
Previous Article in Special Issue
Sorghum Biomass Production for Energy Purpose Using Treated Urban Wastewater and Different Fertilization in a Mediterranean Environment
Article Menu

Export Article

Open AccessArticle
Agriculture 2017, 7(2), 8; doi:10.3390/agriculture7020008

Assessment of Photosynthetic Pigment and Water Contents in Intact Sunflower Plants from Spectral Indices

Agrarian Sciences Department, Campus Sete Lagoas, Federal University of São João del-Rei, Rodovia MG 424, km 47, Sete Lagoas, 35701-970 Minas Gerais, Brazil
*
Author to whom correspondence should be addressed.
Academic Editor: Mohammad Valipour
Received: 13 December 2016 / Accepted: 2 February 2017 / Published: 6 February 2017
(This article belongs to the Special Issue Innovative Approaches to Agricultural Water Management)
View Full-Text   |   Download PDF [1188 KB, uploaded 7 February 2017]   |  

Abstract

Under water-limited conditions, monitoring water and chlorophyll status is essential to avoid restrictions in crop growth and yield. This study was carried out to assess water and chlorophyll contents from spectral indices in sunflower plants. The hybrid Sunbright Supreme was cultivated inside a non-acclimatized greenhouse until the start of the flowering stage, and later was maintained in a growth chamber with the purpose of submitting the plants to a slow and progressive dehydration rate for 12 consecutive days. Spectral (reflectance and transmittance), leaf masses (fresh and dry), and total chlorophyll measurements were accomplished in sunflower plants. The water stress caused a reduction in the water and chlorophyll contents, resulting in linear and nonlinear decreases for the spectral indicators Water Index (WI) and Chlorophyll Content Index (CCI), respectively. The low scattering of the average values around the fitted models indicates that WI and CCI were effective in representing changes in water and chlorophyll status for sunflowers (R2 = 0.912 and R2 = 0.905). The benefits of using hand-held optical meters for reflectance and transmittance are that they enable rapid, accurate, and nondestructive assessments of water and chlorophyll contents in sunflower plants from radiometric indicators. View Full-Text
Keywords: Helianthus annuus L.; reflectance; transmittance; chlorophyll; water stress Helianthus annuus L.; reflectance; transmittance; chlorophyll; water stress
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Steidle Neto, A.J.; Lopes, D.C.; Borges Júnior, J.C.F. Assessment of Photosynthetic Pigment and Water Contents in Intact Sunflower Plants from Spectral Indices. Agriculture 2017, 7, 8.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Agriculture EISSN 2077-0472 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top