Physiological potential of soybean seeds and its relationshipto electrical conductivity

Abstract

Electrical conductivity (EC) stands out among vigor tests because of its capability of detecting damage in seeds in the initial stage, since EC is related to disorganization of the cell membrane. The aim of this paper was to study use of the EC test as an alternative for vigor evaluation in soybean seeds, verifying its relationship to different vigor tests and thus suggesting values and the range of values of electrical conductivity that indicate the performance potential of a seed lot in the field. Eleven seed lots from each of four soybean cultivars were used for this study. The moisture level was determined and the following tests were performed: electrical conductivity, germination, tetrazolium, accelerated aging, first germination count, seedling vigor classification and emergence of seedlings in the field and in sand. The EC test had a significant and negative correlation (p < 0.01) with all the tests performed. Linear regression analysis allowed separation of the seed lots into classifications of very high vigor (EC ≤ 70 μS.cm-1.g-1), high vigor (EC from 71 to 90 μS.cm-1.g-1), medium vigor (EC from 91 to 110 μS.cm-1.g-1) and low vigor (EC ≥ 111 μS.cm-1.g-1).

Antioxidant enzyme activity and physiological potential of Capsicum baccatum var. baccatum seeds as a function of post-harvest storage of fruit

“…In contrast, the seeds from fruit stored for 0 and 20 days had higher electrical conductivity, with values of approximately 300 µS.cm -1 .g -1 (Figure 2D). The electrical conductivity test is based on organization of cell membranes, and it is directly related to seed physiological quality since higher values indicate lower integrity of cell membranes (Prado et al, 2019). Thus, the electrical conductivity values reinforce the results observed in germination and evidence the lower membrane integrity of the seeds obtained from the unstored fruits (0 days) (probably due to the incomplete maturation) and stored for 20 days (due to the seed deterioration).…”

Potencial Fisiológico De Sementes De Peltogyne Confertiflora (Mart. Ex Hayne) Benth. Por Testes Bioquímicos / Physiological Potential of Seeds of Peltogyne Confertiflora (Mart. Ex Hayne) Benth. By Biochemical Tests

“…Assim, para Prado et al (2019) uma limitação no teste de CE é a ausência de valores de referência ou faixa de valores que indiquem o nível do vigor das sementes (alto, médio ou baixo vigor), como também o entendimento em relação aos resultados, principalmente, pela unidade medida utilizada, já que os principais testes utilizados fornecem seus resultados em percentual.…”

“…Considerando que umas das primeiras manifestações de diminuição do potencial fisiológico das sementes é a perda da integridade da membrana celular, estes métodos se fundamentam na reorganização das membranas celulares quando as sementes são imersas em água. Porém, durante o processo de absorção e reorganização, as membranas lixiviam exsudatos como enzimas, nucleotídeos, ácidos graxos, ácidos orgânicos, aminoácidos, proteínas e compostos inorgânicos, como fosfatos e K +, Ca ++, Na + e Mg +, entre outros, que alteram a concentração e o pH da solução, e quanto maior a liberação de solutos, mais elevado está a deterioração das sementes (PRADO et al, 2019).…”

Perubahan Biokimia dan Indikator Vigor Benih Kakao pada Lima Taraf Lamanya Penyimpanan

“…Hasil penelitian Panobianco & Vieira (2007), Pukacka & Ratajczak (2014), dan Erbaş, Tonguç, Karakurt, & Şanli (2016) memperlihatkan adanya hubungan yang negatif antara kandungan lemak dengan asam lemak, sedangkan hasil penelitian Panobianco & Vieira (2007) dan Pukacka & Ratajczak (2014) memperlihatkan adanya hubungan yang negatif antara kandungan lemak dengan daya hantar listrik. Selanjutnya, Pukacka & Ratajczak (2014), Pamungkas, Supriyon, & Purwanto (2018), dan Prado, Krzyzanowski, Martins, & Viera (2019) menambahkan bahwa daya hantar listrik memiliki hubungan yang negatif dengan beberapa indikator vigor benih.…”