Physiological Quality of Rice and Soybean Seeds Produced Under Hydric Stress in Greenhouse

Ruddy A V Escalera,Ivan R Carvalho,Liriana L Fonseca,Giordano G Conte,Cristian Troyjack,Suelen M Fachi,Tiago Z Aumonde,Tiago Pedó,Francielen L Da Silva,Vinícius J Szareski,Francisco A Villela,Lanes B A Jaques,João R Pimentel,Márcio Peter

doi:10.5539/jas.v11n12p22

Ruddy A V Escalera, Ivan R Carvalho + Show 12 more

Open Access

https://doi.org/10.5539/jas.v11n12p22

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Abstract

The hydric resources are primordial for plants growth and development, under conditions where the growing environment express hydric shortage. These conditions can directly or indirectly affect development, the formation of new organs, yield and quality seeds. The study aimed to evaluate the physiological quality of rice and soybean seeds, produced under hydric restriction. Experiment 1: for rice, the scheme was completely randomized with four repetitions, the treats of hydric restrictions were applied in the periods of 0, 24, 48, 72 hours at the phenological stage of filling seeds. Experiment 2: for soybean, the scheme was completely randomized, conducted in factorial scheme, four replicates with four hydric restriction periods of 0, 24, 48 and 72 hours, at the phenological stage of filling seeds. It was verified that as the hydric restriction hours increase, at the rice seeds filling, the physiologic quality is affected, the higher effect occurred at 72 hours of restriction. While at the soybean seeds production it was not verified such effects, only the thousand seeds mass was negatively affected. The physiological quality of rice seeds were more affected, when compared to soybean seeds submitted to the same treats of hydric stress.

Highlights

IntroductionUnder conditions where the growing environment express hydric shortage, the plant can express phenotypic modifications, as well harm cells and photosynthetic functioning, and reduce plants survival at field conditions (Fiorenze et al, 2011)
The hydric resources are primordial for plants growth and development
The treat of 72 hours of restriction presented lower thousand seeds mass (TSM), at the Figure 1B, is observed that AF presented a decrease due to the higher amount of restriction hours, the same for seeds emergence, which the lowest value was found at 72 hours of hydric restriction(Figure 1C).The dry mass of leaves (Figure 1D)had a slighly decrease when submitted to higher period of hydric restriction, in this manner, as in the main variables, it was evidence lower dry matter amount when submitted to 72 hours of restriction

Summary

Introduction

Under conditions where the growing environment express hydric shortage, the plant can express phenotypic modifications, as well harm cells and photosynthetic functioning, and reduce plants survival at field conditions (Fiorenze et al, 2011). The hydric stress occurs due to water loss to the environment thru evapotranspiration, and in higher amounts than water absorption by root structures (Tavares et al, 2013a), these conditions can harm the normal development of crops in the initial stages (Bonfim-Silva et al, 2011), the losses in seeds yield (Costa, 2008; Lobato, 2008). Many are de factors that can influence these characters, such as growing environments and genetic effects. Such influences directly affect the chemical proprieties and seed quality, lipid and protein concentration (Avila et al, 2007)

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