Sugar metabolism in expanding husk leaf of flint corn (Zea mays L.) genotypes differing in husk leaf size

Fujita, Kazuo; El‐Shemy, Hany A.; Sakurai, Naoki; Sendo, S.; Horst, Walter J.; Bürkert, Andreas; Claassen, N.; Flessa, Heinz; Frommer, Wolf B; Goldbach, Heiner E.; Olfs, H.‐W.; Römheld, Volker

doi:10.1007/0-306-47624-x_134

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“…Husk leaves growing on the shortening ear-stalk of maize are special leaves. The development of husk leaves generally stopped [17]. Therefore, the area of husk leaves in this study was measured at DAS 22, because the area did not increase at this time.…”

Section: Discussionmentioning

confidence: 99%

“…The husk leaf is a special leaf, similar to leaves, containing chlorophyll for photosynthesis, and the photosynthetic products of husk leaves provide grains and contribute to the dry weights of grains [16,17]. The contribution rate of husk leaves to yield is approximately 15% in maize, including the contribution of photosynthesis in husk leaves [16,17]. Therefore, the senescence of husk leaves is closely related to maize yield.…”

Section: Introductionmentioning

confidence: 99%

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Husk Leaf Senescence Characteristics of Spring Maize (Zea mays L.) Cultivated in Two Row Directions and Three Plant Spacings in Northeast China

Liu

Wang

et al. 2020

Agronomy

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Row direction and plant spacing influence crop senescence. An experiment was conducted to analyze the effect of row direction and plant spacing on the husk leaf senescence. Physiological indicators related to husk leaf senescence at days after silking (DAS) 12, 22, and 40 were investigated under two row directions (east to west and south to north, abbreviated as EW and SN, respectively) and three plant patterns (single rows spaced at 65 cm, 40 cm twin rows spaced at 90 cm between the paired rows of narrow–wide rows, and 40 cm twin rows spaced at 160 cm between the paired rows of narrow–wide rows, abbreviated as SR, WN1, and WN2, respectively). Row direction affects the chlorophyll content and dehydration rate according to our results. Superoxide dismutase activity at DAS 22, catalase (CAT) activity at DS, and abscisic acid (ABA) concentrations at DAS 12, 22, and 40 were significantly affected by plant spacing. The CAT activities of WN1 and WN2 were significantly higher than those of SR, and WN2 had a lower ABA concentration than WN1 and SR. Our results suggest that row direction from SN and plant spacing from WN1 and WN2 were the suitable conditions for delaying the senescence of husk leaves of maize in the experimental site.

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Section: Discussionmentioning

confidence: 99%